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Class 11 Mathematics Easy Quiz

Level 23 • 50/50 questions • 40 seconds per question.

Level readiness 50/50 Questions
Time Left 33:20 40 sec/question
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ModeClassic Quiz
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Question 1 / 50 0 score
Answered 0/50 Correct 0 Time 33:20

यदि \(A=\{2,3\}\) और \(B=\{5,6\}\) हैं, तो \(A\times B\) कौन सा है?

If \(A=\{2,3\}\) and \(B=\{5,6\}\), which is \(A\times B\)?

Explanation opens after your attempt
Correct Answer

A. ({(2,5),(2,6),(3,5),(3,6)})

Step 1

Concept

In \(A\times B\), the first component comes from (A) and the second from (B). While listing, pair each first-set element with every element of (B).

Step 2

Why this answer is correct

The correct answer is A. ({(2,5),(2,6),(3,5),(3,6)}). In \(A\times B\), the first component comes from (A) and the second from (B). While listing, pair each first-set element with every element of (B).

Step 3

Exam Tip

\(A\times B\) में पहला घटक (A) से और दूसरा घटक (B) से आता है। सूची बनाते समय हर पहले तत्व को (B) के हर तत्व से मिलाएं।

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यदि \(P=\{0,4,8\}\) और \(Q=\{1\}\) हैं, तो \(P\times Q\) में कितने क्रमित युग्म होंगे?

If \(P=\{0,4,8\}\) and \(Q=\{1\}\), how many ordered pairs are in \(P\times Q\)?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

(n\(P\times Q\)=n(P)n(Q)=3\times 1=3). In counting questions, multiply the number of elements.

Step 2

Why this answer is correct

The correct answer is B. (3). (n\(P\times Q\)=n(P)n(Q)=3\times 1=3). In counting questions, multiply the number of elements.

Step 3

Exam Tip

(n\(P\times Q\)=n(P)n(Q)=3\times 1=3)। गिनती वाले प्रश्न में तत्वों की संख्या गुणा करें।

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यदि \(A=\{7\}\) और \(B=\{2,4,6\}\) हैं, तो \(A\times B\) कौन सा होगा?

If \(A=\{7\}\) and \(B=\{2,4,6\}\), which will be \(A\times B\)?

Explanation opens after your attempt
Correct Answer

A. ({(7,2),(7,4),(7,6)})

Step 1

Concept

The only element (7) of (A) stays in the first position. All elements of (B) come in the second position one by one.

Step 2

Why this answer is correct

The correct answer is A. ({(7,2),(7,4),(7,6)}). The only element (7) of (A) stays in the first position. All elements of (B) come in the second position one by one.

Step 3

Exam Tip

(A) का एकमात्र तत्व (7) पहले स्थान पर रहेगा। दूसरे स्थान पर (B) के सभी तत्व क्रम से आएंगे।

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यदि \(X=\{1,5\}\) और \(Y=\{3,9\}\) हैं, तो कौन सा युग्म \(X\times Y\) में नहीं है?

If \(X=\{1,5\}\) and \(Y=\{3,9\}\), which pair is not in \(X\times Y\)?

Explanation opens after your attempt
Correct Answer

D. ((3,1))

Step 1

Concept

In ((3,1)), the first component is (3), but \(3\notin X\). Check the first and second positions separately for membership.

Step 2

Why this answer is correct

The correct answer is D. ((3,1)). In ((3,1)), the first component is (3), but \(3\notin X\). Check the first and second positions separately for membership.

Step 3

Exam Tip

((3,1)) में पहला घटक (3) है, लेकिन \(3\notin X\)। सदस्यता जांचते समय पहला और दूसरा स्थान अलग-अलग देखें।

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यदि \((u,v)\in A\times B\) है, तो (u) किस समुच्चय से होना चाहिए?

If \((u,v)\in A\times B\), from which set must (u) come?

Explanation opens after your attempt
Correct Answer

A. (A)

Step 1

Concept

In \(A\times B\), the first component always comes from the first set (A). This is the basic identity of Cartesian product.

Step 2

Why this answer is correct

The correct answer is A. (A). In \(A\times B\), the first component always comes from the first set (A). This is the basic identity of Cartesian product.

Step 3

Exam Tip

\(A\times B\) में पहला घटक हमेशा पहले समुच्चय (A) से होता है। यही कार्तीय गुणन की मूल पहचान है।

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यदि \(R=\{4,5,6\}\) और \(S=\varnothing\) हैं, तो \(R\times S\) क्या होगा?

If \(R=\{4,5,6\}\) and \(S=\varnothing\), what is \(R\times S\)?

Explanation opens after your attempt
Correct Answer

A. \(\varnothing\)

Step 1

Concept

There is no element in (S) for the second component, so no pair is formed. Product with an empty set gives the empty set.

Step 2

Why this answer is correct

The correct answer is A. \(\varnothing\). There is no element in (S) for the second component, so no pair is formed. Product with an empty set gives the empty set.

Step 3

Exam Tip

दूसरे घटक के लिए (S) में कोई तत्व नहीं है, इसलिए कोई युग्म नहीं बनेगा। खाली समुच्चय के साथ गुणन हमेशा खाली देता है।

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यदि (n(A)=6) और (n(B)=2) है, तो (n\(A\times B\)) कितना होगा?

If (n(A)=6) and (n(B)=2), what is (n\(A\times B\))?

Explanation opens after your attempt
Correct Answer

B. (12)

Step 1

Concept

For finite sets, (n\(A\times B\)=n(A)n(B)). Therefore, \(6\times 2=12\).

Step 2

Why this answer is correct

The correct answer is B. (12). For finite sets, (n\(A\times B\)=n(A)n(B)). Therefore, \(6\times 2=12\).

Step 3

Exam Tip

सीमित समुच्चयों के लिए (n\(A\times B\)=n(A)n(B))। इसलिए \(6\times 2=12\)।

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यदि \(A=\{a,b\}\) और \(B=\{c\}\) हैं, तो \(B\times A\) कौन सा है?

If \(A=\{a,b\}\) and \(B=\{c\}\), which is \(B\times A\)?

Explanation opens after your attempt
Correct Answer

B. ({(c,a),(c,b)})

Step 1

Concept

In \(B\times A\), the first component is (c) from (B), and the second is (a) or (b) from (A). Reversed order gives a different answer.

Step 2

Why this answer is correct

The correct answer is B. ({(c,a),(c,b)}). In \(B\times A\), the first component is (c) from (B), and the second is (a) or (b) from (A). Reversed order gives a different answer.

Step 3

Exam Tip

\(B\times A\) में पहला घटक (B) से (c) और दूसरा घटक (A) से (a) या (b) होगा। उल्टा क्रम अलग उत्तर देता है।

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निम्न में से \(A\times B\) का सही सेट-बिल्डर रूप कौन सा है?

Which of the following is the correct set-builder form of \(A\times B\)?

Explanation opens after your attempt
Correct Answer

A. \({(x,y):x\in A,\ y\in B}\)

Step 1

Concept

By definition, \(A\times B={(x,y):x\in A,\ y\in B}\). Do not change the order of components in set-builder form.

Step 2

Why this answer is correct

The correct answer is A. \({(x,y):x\in A,\ y\in B}\). By definition, \(A\times B={(x,y):x\in A,\ y\in B}\). Do not change the order of components in set-builder form.

Step 3

Exam Tip

परिभाषा के अनुसार \(A\times B={(x,y):x\in A,\ y\in B}\)। सेट-बिल्डर रूप में भी घटकों का क्रम न बदलें।

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यदि ((m,8)=(4,n)) है, तो (m) और (n) के मान क्या हैं?

If ((m,8)=(4,n)), what are the values of (m) and (n)?

Explanation opens after your attempt
Correct Answer

B. (m=4,\ n=8)

Step 1

Concept

In equality of ordered pairs, corresponding components are equal. Hence (m=4) and (n=8).

Step 2

Why this answer is correct

The correct answer is B. (m=4,\ n=8). In equality of ordered pairs, corresponding components are equal. Hence (m=4) and (n=8).

Step 3

Exam Tip

क्रमित युग्मों की समानता में संबंधित घटक बराबर होते हैं। इसलिए (m=4) और (n=8)।

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यदि \(A=\{10,20\}\) और \(B=\{30,40,50\}\) हैं, तो \(A\times B\) में कुल कितने युग्म होंगे?

If \(A=\{10,20\}\) and \(B=\{30,40,50\}\), how many pairs are there in \(A\times B\)?

Explanation opens after your attempt
Correct Answer

B. (6)

Step 1

Concept

(A) has (2) elements and (B) has (3) elements, so \(2\times 3=6\). Count the elements first and then multiply.

Step 2

Why this answer is correct

The correct answer is B. (6). (A) has (2) elements and (B) has (3) elements, so \(2\times 3=6\). Count the elements first and then multiply.

Step 3

Exam Tip

(A) में (2) और (B) में (3) तत्व हैं, इसलिए \(2\times 3=6\)। पहले तत्व गिनें फिर गुणा करें।

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यदि \(A=\{1,4\}\) और \(B=\{4,1\}\) हैं, तो कौन सा कथन सही है?

If \(A=\{1,4\}\) and \(B=\{4,1\}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (A=B) और \(A\times B=A\times A\)(A=B) and \(A\times B=A\times A\)

Step 1

Concept

Order of elements in a set is not important, so (A=B). Therefore, \(A\times B=A\times A\).

Step 2

Why this answer is correct

The correct answer is A. (A=B) और \(A\times B=A\times A\) / (A=B) and \(A\times B=A\times A\). Order of elements in a set is not important, so (A=B). Therefore, \(A\times B=A\times A\).

Step 3

Exam Tip

समुच्चय में तत्वों का क्रम महत्वपूर्ण नहीं होता, इसलिए (A=B)। इसी कारण \(A\times B=A\times A\) होगा।

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यदि \(A=\{2,4,6\}\) और \(B=\{1,3\}\) हैं, तो कौन सा युग्म \(A\times B\) का तत्व है?

If \(A=\{2,4,6\}\) and \(B=\{1,3\}\), which pair is an element of \(A\times B\)?

Explanation opens after your attempt
Correct Answer

B. ((4,3))

Step 1

Concept

In ((4,3)), \(4\in A\) and \(3\in B\), so it is correct. Having the elements present is not enough; their positions must be correct.

Step 2

Why this answer is correct

The correct answer is B. ((4,3)). In ((4,3)), \(4\in A\) and \(3\in B\), so it is correct. Having the elements present is not enough; their positions must be correct.

Step 3

Exam Tip

((4,3)) में \(4\in A\) और \(3\in B\), इसलिए यह सही है। केवल तत्व मौजूद होना काफी नहीं, सही स्थान भी जरूरी है।

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यदि (n\(A\times B\)=15) और (n(A)=5) है, तो (n(B)) कितना होगा?

If (n\(A\times B\)=15) and (n(A)=5), what is (n(B))?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

\(15=5\times n(B)\), so (n(B)=3). To find the unknown count, divide the total pairs by the known count.

Step 2

Why this answer is correct

The correct answer is B. (3). \(15=5\times n(B)\), so (n(B)=3). To find the unknown count, divide the total pairs by the known count.

Step 3

Exam Tip

\(15=5\times n(B)\), इसलिए (n(B)=3)। अज्ञात संख्या निकालने के लिए कुल युग्मों को ज्ञात संख्या से भाग दें।

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यदि \(A=\varnothing\) और \(B=\{9\}\) हैं, तो (n\(A\times B\)) कितना है?

If \(A=\varnothing\) and \(B=\{9\}\), what is (n\(A\times B\))?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

There is no element in (A) for the first component, so no pair is formed. Since the number is asked, the answer is (0).

Step 2

Why this answer is correct

The correct answer is A. (0). There is no element in (A) for the first component, so no pair is formed. Since the number is asked, the answer is (0).

Step 3

Exam Tip

पहले घटक के लिए (A) में कोई तत्व नहीं है, इसलिए कोई युग्म नहीं बनेगा। संख्या पूछी गई है, इसलिए उत्तर (0) है।

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यदि \(A=\{1,2\}\) है, तो \(A\times A\) में कौन सा युग्म होगा?

If \(A=\{1,2\}\), which pair will be in \(A\times A\)?

Explanation opens after your attempt
Correct Answer

B. ((2,1))

Step 1

Concept

Both components of ((2,1)) are from (A), so it is in \(A\times A\). In \(A\times A\), both positions use elements of (A).

Step 2

Why this answer is correct

The correct answer is B. ((2,1)). Both components of ((2,1)) are from (A), so it is in \(A\times A\). In \(A\times A\), both positions use elements of (A).

Step 3

Exam Tip

((2,1)) के दोनों घटक (A) से हैं, इसलिए यह \(A\times A\) में है। \(A\times A\) में दोनों स्थानों पर (A) के तत्व आते हैं।

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यदि \(A=\{1,2,3,4\}\) है, तो (n\(A\times A\)) कितना होगा?

If \(A=\{1,2,3,4\}\), what is (n\(A\times A\))?

Explanation opens after your attempt
Correct Answer

C. (16)

Step 1

Concept

(n(A)=4), so (n\(A\times A\)=4\times 4=16). With the same set, the count behaves like a square.

Step 2

Why this answer is correct

The correct answer is C. (16). (n(A)=4), so (n\(A\times A\)=4\times 4=16). With the same set, the count behaves like a square.

Step 3

Exam Tip

(n(A)=4), इसलिए (n\(A\times A\)=4\times 4=16)। समान समुच्चय होने पर भी संख्या वर्ग की तरह आती है।

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यदि \(A\times B=\varnothing\) और \(B\ne\varnothing\) है, तो (A) के बारे में क्या सही है?

If \(A\times B=\varnothing\) and \(B\ne\varnothing\), what is true about (A)?

Explanation opens after your attempt
Correct Answer

A. \(A=\varnothing\)

Step 1

Concept

If (B) is not empty and the product is still empty, then (A) must be empty. If a Cartesian product is empty, at least one set is empty.

Step 2

Why this answer is correct

The correct answer is A. \(A=\varnothing\). If (B) is not empty and the product is still empty, then (A) must be empty. If a Cartesian product is empty, at least one set is empty.

Step 3

Exam Tip

यदि (B) खाली नहीं है और गुणन फिर भी खाली है, तो (A) खाली होना चाहिए। कार्तीय गुणन खाली होने पर कम से कम एक समुच्चय खाली होता है।

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यदि \((x,y)\in {6}\times{2,3,4}\) है, तो (x) का मान क्या होगा?

If \((x,y)\in {6}\times{2,3,4}\), what is the value of (x)?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

The first component comes from the first set ({6}), so (x=6). The position of the component quickly gives the value.

Step 2

Why this answer is correct

The correct answer is C. (6). The first component comes from the first set ({6}), so (x=6). The position of the component quickly gives the value.

Step 3

Exam Tip

पहला घटक पहले समुच्चय ({6}) से आता है, इसलिए (x=6)। घटक की स्थिति से मान तुरंत मिल जाता है।

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यदि \((x,y)\in {2,4}\times{5}\) है, तो (y) का मान क्या होगा?

If \((x,y)\in {2,4}\times{5}\), what is the value of (y)?

Explanation opens after your attempt
Correct Answer

C. (5)

Step 1

Concept

The second component comes from the second set ({5}), so (y=5). Match the second position with the second set.

Step 2

Why this answer is correct

The correct answer is C. (5). The second component comes from the second set ({5}), so (y=5). Match the second position with the second set.

Step 3

Exam Tip

दूसरा घटक दूसरे समुच्चय ({5}) से आता है, इसलिए (y=5)। दूसरे स्थान को दूसरे समुच्चय से मिलाएं।

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यदि \(A=\{1,3,5\}\) और \(B=\{2,4\}\) हैं, तो \(A\times B\) में पहले घटक (3) वाले कितने युग्म होंगे?

If \(A=\{1,3,5\}\) and \(B=\{2,4\}\), how many pairs in \(A\times B\) have first component (3)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

The first component (3) is fixed and the second component is chosen from the (2) elements of (B). The number of such pairs is (n(B)).

Step 2

Why this answer is correct

The correct answer is B. (2). The first component (3) is fixed and the second component is chosen from the (2) elements of (B). The number of such pairs is (n(B)).

Step 3

Exam Tip

पहला घटक (3) निश्चित है और दूसरा घटक (B) के (2) तत्वों में से चुना जाएगा। ऐसे युग्मों की संख्या (n(B)) होती है।

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यदि \(A=\{0,2\}\) और \(B=\{1,3,5\}\) हैं, तो \(A\times B\) में दूसरे घटक (3) वाले कितने युग्म होंगे?

If \(A=\{0,2\}\) and \(B=\{1,3,5\}\), how many pairs in \(A\times B\) have second component (3)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

The second component (3) is fixed and the first component can be any of the (2) elements of (A). In such questions, keep the fixed component separate.

Step 2

Why this answer is correct

The correct answer is B. (2). The second component (3) is fixed and the first component can be any of the (2) elements of (A). In such questions, keep the fixed component separate.

Step 3

Exam Tip

दूसरा घटक (3) निश्चित है और पहला घटक (A) के (2) तत्वों में से कोई भी हो सकता है। ऐसे प्रश्नों में निश्चित घटक को अलग रखें।

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यदि \(M=\{2,5\}\) और \(N=\{8,9\}\) हैं, तो \(M\times N\) और \(N\times M\) के बारे में सही कथन कौन सा है?

If \(M=\{2,5\}\) and \(N=\{8,9\}\), which statement about \(M\times N\) and \(N\times M\) is correct?

Explanation opens after your attempt
Correct Answer

A. दोनों की संख्या बराबर है पर युग्मों का क्रम अलग हैBoth have equal count but the order of pairs is different

Step 1

Concept

Both have \(2\times 2=4\) pairs, but the order of components differs. Equal count does not mean the sets are necessarily equal.

Step 2

Why this answer is correct

The correct answer is A. दोनों की संख्या बराबर है पर युग्मों का क्रम अलग है / Both have equal count but the order of pairs is different. Both have \(2\times 2=4\) pairs, but the order of components differs. Equal count does not mean the sets are necessarily equal.

Step 3

Exam Tip

दोनों में \(2\times 2=4\) युग्म होंगे, पर घटकों का क्रम अलग होगा। संख्या बराबर होने से समुच्चय समान होना जरूरी नहीं है।

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कौन सा कथन क्रमित युग्मों के लिए सही है?

Which statement is correct for ordered pairs?

Explanation opens after your attempt
Correct Answer

A. ((p,q)=(r,s)\Rightarrow p=r) और (q=s)((p,q)=(r,s)\Rightarrow p=r) and (q=s)

Step 1

Concept

In equality of ordered pairs, components in the same positions are equal. This rule is very useful in variable-based questions.

Step 2

Why this answer is correct

The correct answer is A. ((p,q)=(r,s)\Rightarrow p=r) और (q=s) / ((p,q)=(r,s)\Rightarrow p=r) and (q=s). In equality of ordered pairs, components in the same positions are equal. This rule is very useful in variable-based questions.

Step 3

Exam Tip

क्रमित युग्मों की समानता में समान स्थानों के घटक बराबर होते हैं। यह नियम चर वाले प्रश्नों में सबसे उपयोगी है।

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यदि \(A=\{2,3\}\) और \(B=\{1,2\}\) हैं, तो क्या \((2,2)\in A\times B\) है?

If \(A=\{2,3\}\) and \(B=\{1,2\}\), is \((2,2)\in A\times B\)?

Explanation opens after your attempt
Correct Answer

A. हां, क्योंकि \(2\in A\) और \(2\in B\)Yes, because \(2\in A\) and \(2\in B\)

Step 1

Concept

((2,2)) is correct because the first (2) is in (A) and the second (2) is in (B). Components may be equal as long as membership is correct.

Step 2

Why this answer is correct

The correct answer is A. हां, क्योंकि \(2\in A\) और \(2\in B\) / Yes, because \(2\in A\) and \(2\in B\). ((2,2)) is correct because the first (2) is in (A) and the second (2) is in (B). Components may be equal as long as membership is correct.

Step 3

Exam Tip

((2,2)) सही है क्योंकि पहला (2) (A) में और दूसरा (2) (B) में है। घटक समान हो सकते हैं, बस उनकी सदस्यता सही होनी चाहिए।

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यदि \(A=\{1,2\}\), \(B=\{3\}\) और \(C=\{4,5,6\}\) हैं, तो (n\(A\times B\times C\)) कितना होगा?

If \(A=\{1,2\}\), \(B=\{3\}\), and \(C=\{4,5,6\}\), what is (n\(A\times B\times C\))?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

For the product of three sets, the total count is (n(A)n(B)n(C)). Therefore, \(2\times 1\times 3=6\).

Step 2

Why this answer is correct

The correct answer is C. (6). For the product of three sets, the total count is (n(A)n(B)n(C)). Therefore, \(2\times 1\times 3=6\).

Step 3

Exam Tip

तीन समुच्चयों के गुणन में कुल संख्या (n(A)n(B)n(C)) होती है। इसलिए \(2\times 1\times 3=6\)।

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यदि \(A=\{0,1\}\) और \(B=\{0,2\}\) हैं, तो \(A\times B\) में कौन सा युग्म नहीं होगा?

If \(A=\{0,1\}\) and \(B=\{0,2\}\), which pair will not be in \(A\times B\)?

Explanation opens after your attempt
Correct Answer

D. ((2,1))

Step 1

Concept

In ((2,1)), the first component is (2), but \(2\notin A\). In wrong pairs, the position is often reversed.

Step 2

Why this answer is correct

The correct answer is D. ((2,1)). In ((2,1)), the first component is (2), but \(2\notin A\). In wrong pairs, the position is often reversed.

Step 3

Exam Tip

((2,1)) में पहला घटक (2) है, लेकिन \(2\notin A\)। गलत युग्म में अक्सर स्थान उल्टा होता है।

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यदि \(A\subset B\) है, तो \(C\times A\) और \(C\times B\) के लिए सही कथन कौन सा है?

If \(A\subset B\), which statement is correct for \(C\times A\) and \(C\times B\)?

Explanation opens after your attempt
Correct Answer

A. \(C\times A\subset C\times B\)

Step 1

Concept

Elements of (A) in the second component are also in (B), so \(C\times A\subset C\times B\). With subsets, check the position of the related component.

Step 2

Why this answer is correct

The correct answer is A. \(C\times A\subset C\times B\). Elements of (A) in the second component are also in (B), so \(C\times A\subset C\times B\). With subsets, check the position of the related component.

Step 3

Exam Tip

दूसरे घटक में (A) के तत्व (B) में भी हैं, इसलिए \(C\times A\subset C\times B\)। उपसमुच्चय के साथ संबंधित घटक की स्थिति देखें।

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यदि \(A=\{1\}\) और \(B=\{2\}\) हैं, तो \(A\times B\) और \(B\times A\) में क्या अंतर है?

If \(A=\{1\}\) and \(B=\{2\}\), what is the difference between \(A\times B\) and \(B\times A\)?

Explanation opens after your attempt
Correct Answer

A. \(A\times B={(1,2)}\) और \(B\times A={(2,1)}\)\(A\times B={(1,2)}\) and \(B\times A={(2,1)}\)

Step 1

Concept

In the first product, (1) is in the first position, and in the second, (2) is in the first position. Order matters even with one element each.

Step 2

Why this answer is correct

The correct answer is A. \(A\times B={(1,2)}\) और \(B\times A={(2,1)}\) / \(A\times B={(1,2)}\) and \(B\times A={(2,1)}\). In the first product, (1) is in the first position, and in the second, (2) is in the first position. Order matters even with one element each.

Step 3

Exam Tip

पहले गुणन में (1) पहले स्थान पर है और दूसरे में (2) पहले स्थान पर है। एक-एक तत्व होने पर भी क्रम महत्वपूर्ण रहता है।

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यदि \(A=\{2,4,6\}\) और \(B=\{1,5\}\) हैं, तो \(A\times B\) को बिंदुओं के रूप में दिखाने पर कितने बिंदु मिलेंगे?

If \(A=\{2,4,6\}\) and \(B=\{1,5\}\), how many points are obtained when \(A\times B\) is shown as points?

Explanation opens after your attempt
Correct Answer

D. (6)

Step 1

Concept

Each ordered pair can be treated like a point, and there are \(3\times 2=6\) pairs. The same multiplication rule applies in coordinate questions.

Step 2

Why this answer is correct

The correct answer is D. (6). Each ordered pair can be treated like a point, and there are \(3\times 2=6\) pairs. The same multiplication rule applies in coordinate questions.

Step 3

Exam Tip

हर क्रमित युग्म एक बिंदु की तरह माना जा सकता है और कुल \(3\times 2=6\) युग्म हैं। निर्देशांक वाले प्रश्नों में भी वही गुणा नियम लागू होता है।

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\(यदि शर्ट रंगों का समुच्चय (A={\)लाल,नीला\(}) और आकारों का समुच्चय (B={\)छोटा,मध्यम,बड़ा\(}) है, तो (A\times B) में कितने चुनाव होंगे\)?

\(If shirt color set (A={\)red,blue\(}) and size set (B={\)small,medium,large\(}) are given, how many choices are in (A\times B)\)?

Explanation opens after your attempt
Correct Answer

D. (6)

Step 1

Concept

There are (2) colors and (3) sizes, so \(2\times 3=6\) choices are formed. Real-life combinations are counted using Cartesian product.

Step 2

Why this answer is correct

The correct answer is D. (6). There are (2) colors and (3) sizes, so \(2\times 3=6\) choices are formed. Real-life combinations are counted using Cartesian product.

Step 3

Exam Tip

रंगों की संख्या (2) और आकारों की संख्या (3) है, इसलिए \(2\times 3=6\) चुनाव बनेंगे। वास्तविक जीवन के संयोजन कार्तीय गुणन से गिने जाते हैं।

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यदि \(A=\{2,3,4\}\) और \(B=\{6\}\) हैं, तो \(B\times A\) में कितने तत्व होंगे?

If \(A=\{2,3,4\}\) and \(B=\{6\}\), how many elements are in \(B\times A\)?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

(n\(B\times A\)=n(B)n(A)=1\times 3=3). Reversing order does not change the count, but it changes the order of pairs.

Step 2

Why this answer is correct

The correct answer is B. (3). (n\(B\times A\)=n(B)n(A)=1\times 3=3). Reversing order does not change the count, but it changes the order of pairs.

Step 3

Exam Tip

(n\(B\times A\)=n(B)n(A)=1\times 3=3)। क्रम बदलने से संख्या नहीं बदलती, पर युग्मों का क्रम बदलता है।

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यदि \(A=\{1,2,3\}\) और \(B=\{4,5\}\) हैं, तो \(A\times B\) में (3) को पहले घटक के रूप में लेकर कौन से युग्म होंगे?

If \(A=\{1,2,3\}\) and \(B=\{4,5\}\), which pairs in \(A\times B\) have (3) as the first component?

Explanation opens after your attempt
Correct Answer

A. ({(3,4),(3,5)})

Step 1

Concept

The first component (3) is fixed, and the second component is (4) or (5) from (B). With a fixed first component, only elements of the second set vary.

Step 2

Why this answer is correct

The correct answer is A. ({(3,4),(3,5)}). The first component (3) is fixed, and the second component is (4) or (5) from (B). With a fixed first component, only elements of the second set vary.

Step 3

Exam Tip

पहला घटक (3) स्थिर है और दूसरा घटक (B) से (4) या (5) होगा। निश्चित पहले घटक पर केवल दूसरे समुच्चय के तत्व बदलते हैं।

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यदि \(A=\{5,7\}\) और \(B=\{1,2,3\}\) हैं, तो दूसरे घटक (2) वाले \(A\times B\) के युग्म कौन से हैं?

If \(A=\{5,7\}\) and \(B=\{1,2,3\}\), which pairs of \(A\times B\) have second component (2)?

Explanation opens after your attempt
Correct Answer

A. ({(5,2),(7,2)})

Step 1

Concept

The second component (2) is fixed, and the first component is (5) or (7) from (A). In such pairs, only the first position changes.

Step 2

Why this answer is correct

The correct answer is A. ({(5,2),(7,2)}). The second component (2) is fixed, and the first component is (5) or (7) from (A). In such pairs, only the first position changes.

Step 3

Exam Tip

दूसरा घटक (2) स्थिर है और पहला घटक (A) से (5) या (7) होगा। ऐसे युग्मों में पहला स्थान ही बदलता है।

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यदि \(A=\{0,1\}\) और \(B=\{2,3\}\) हैं, तो \(A\times B\) के तत्वों की सही संख्या और रूप क्या है?

If \(A=\{0,1\}\) and \(B=\{2,3\}\), what is the correct number and form of elements of \(A\times B\)?

Explanation opens after your attempt
Correct Answer

A. (4) क्रमित युग्म(4) ordered pairs

Step 1

Concept

\(A\times B\) has \(2\times 2=4\) elements, and they are ordered pairs. Do not forget the pair form in the answer.

Step 2

Why this answer is correct

The correct answer is A. (4) क्रमित युग्म / (4) ordered pairs. \(A\times B\) has \(2\times 2=4\) elements, and they are ordered pairs. Do not forget the pair form in the answer.

Step 3

Exam Tip

\(A\times B\) में \(2\times 2=4\) तत्व होंगे और वे क्रमित युग्म होंगे। उत्तर में युग्मों का रूप न भूलें।

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यदि \(A=\{1,2\}\) और \(B=\{3,4,5\}\) हैं, तो \(A\times B\) में ((2,4)) का स्थान किस कारण सही है?

If \(A=\{1,2\}\) and \(B=\{3,4,5\}\), why is ((2,4)) correctly placed in \(A\times B\)?

Explanation opens after your attempt
Correct Answer

A. क्योंकि \(2\in A\) और \(4\in B\)Because \(2\in A\) and \(4\in B\)

Step 1

Concept

In ((2,4)), the first component (2) is from (A) and the second component (4) is from (B). This is the correct membership check.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि \(2\in A\) और \(4\in B\) / Because \(2\in A\) and \(4\in B\). In ((2,4)), the first component (2) is from (A) and the second component (4) is from (B). This is the correct membership check.

Step 3

Exam Tip

((2,4)) में पहला घटक (2) (A) से और दूसरा घटक (4) (B) से है। यही सदस्यता की सही जांच है।

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यदि \(A={x:x\in \mathbb{N},\ x\leq 2}\) और \(B=\{10,20\}\) है, तो \(A\times B\) में कितने तत्व हैं?

If \(A={x:x\in \mathbb{N},\ x\leq 2}\) and \(B=\{10,20\}\), how many elements are in \(A\times B\)?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

\(A=\{1,2\}\) and (B) has (2) elements, so \(2\times 2=4\). First convert set-builder form into a list.

Step 2

Why this answer is correct

The correct answer is B. (4). \(A=\{1,2\}\) and (B) has (2) elements, so \(2\times 2=4\). First convert set-builder form into a list.

Step 3

Exam Tip

\(A=\{1,2\}\) और (B) में (2) तत्व हैं, इसलिए \(2\times 2=4\)। पहले सेट-बिल्डर रूप को सूची में बदलें।

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यदि \(A=\{1,2,3\}\) और \(B=\{1,2,3\}\) हैं, तो \(A\times B\) में समान घटक वाले कितने युग्म होंगे?

If \(A=\{1,2,3\}\) and \(B=\{1,2,3\}\), how many pairs in \(A\times B\) have equal components?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

The equal-component pairs are ((1,1),(2,2),(3,3)). In such questions, do not count all (9) pairs; count only the required condition.

Step 2

Why this answer is correct

The correct answer is B. (3). The equal-component pairs are ((1,1),(2,2),(3,3)). In such questions, do not count all (9) pairs; count only the required condition.

Step 3

Exam Tip

समान घटक वाले युग्म ((1,1),(2,2),(3,3)) हैं। ऐसे प्रश्न में पूरी संख्या (9) नहीं, केवल मांगी गई शर्त गिनें।

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यदि \(A=\{-2,0\}\) और \(B=\{1\}\) हैं, तो \(A\times B\) कौन सा है?

If \(A=\{-2,0\}\) and \(B=\{1\}\), which is \(A\times B\)?

Explanation opens after your attempt
Correct Answer

A. ({(-2,1),(0,1)})

Step 1

Concept

Elements of (A) come in the first position and (1) from (B) comes in the second position. A negative element is used like any ordinary element.

Step 2

Why this answer is correct

The correct answer is A. ({(-2,1),(0,1)}). Elements of (A) come in the first position and (1) from (B) comes in the second position. A negative element is used like any ordinary element.

Step 3

Exam Tip

(A) के तत्व पहले स्थान पर और (B) का (1) दूसरे स्थान पर आएगा। ऋणात्मक तत्व भी सामान्य तत्व की तरह प्रयोग होता है।

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\(यदि (A={\)सोम,मंगल\(}) और (B={\)सुबह,शाम}) हैं, तो ((सोम,शाम)) किसका तत्व है?

\(If (A={\)Mon,Tue\(}) and (B={\)morning,evening}), of which set is ((Mon,evening)) an element?

Explanation opens after your attempt
Correct Answer

A. \(A\times B\)

Step 1

Concept

The first component (Mon) is from (A) and the second component (evening\() is from (B). Therefore, the pair belongs to (A\times B).\)

Step 2

Why this answer is correct

\(The correct answer is A. (A\times B). The first component (\)Mon) is from (A) and the second component (evening\() is from (B). Therefore, the pair belongs to (A\times B).\)

Step 3

Exam Tip

पहला घटक (सोम) (A) से और दूसरा घटक (शाम) (B) से है। \(इसलिए युग्म (A\times B) में आता है\)।

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यदि \(A=\{1,2\}\) और \(B=\{3,4\}\) हैं, तो \(A\times B\) में (4) दूसरे घटक के रूप में किन युग्मों में आएगा?

If \(A=\{1,2\}\) and \(B=\{3,4\}\), in which pairs will (4) appear as the second component in \(A\times B\)?

Explanation opens after your attempt
Correct Answer

A. ({(1,4),(2,4)})

Step 1

Concept

The second component (4) is fixed and the first component comes from (1) or (2) in (A). With a second-component condition, the first set varies.

Step 2

Why this answer is correct

The correct answer is A. ({(1,4),(2,4)}). The second component (4) is fixed and the first component comes from (1) or (2) in (A). With a second-component condition, the first set varies.

Step 3

Exam Tip

दूसरा घटक (4) तय है और पहला घटक (A) के (1) या (2) से आएगा। दूसरे घटक की शर्त में पहला समुच्चय बदलता है।

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यदि \(A=\{3,4\}\) और \(B=\{5\}\) हैं, तो कौन सा कथन सही है?

If \(A=\{3,4\}\) and \(B=\{5\}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. \(A\times B={(3,5),(4,5)}\)

Step 1

Concept

The first component is (3) or (4) from (A), and the second component is (5) from (B). Do not confuse Cartesian product with union.

Step 2

Why this answer is correct

The correct answer is A. \(A\times B={(3,5),(4,5)}\). The first component is (3) or (4) from (A), and the second component is (5) from (B). Do not confuse Cartesian product with union.

Step 3

Exam Tip

पहला घटक (A) से (3) या (4) और दूसरा घटक (B) से (5) होगा। कार्तीय गुणन को संघ न समझें।

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यदि \(A=\{1,2\}\) और \(B=\{3,4,5\}\) हैं, तो \(A\times B\) में कितने युग्मों का पहला घटक (A) का सबसे छोटा तत्व है?

If \(A=\{1,2\}\) and \(B=\{3,4,5\}\), how many pairs in \(A\times B\) have the smallest element of (A) as the first component?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The smallest element of (A) is (1), and it pairs with the (3) elements of (B). For a fixed first component, the answer is (n(B)).

Step 2

Why this answer is correct

The correct answer is C. (3). The smallest element of (A) is (1), and it pairs with the (3) elements of (B). For a fixed first component, the answer is (n(B)).

Step 3

Exam Tip

(A) का सबसे छोटा तत्व (1) है और उसके साथ (B) के (3) तत्व जुड़ेंगे। निश्चित पहले घटक के लिए उत्तर (n(B)) होता है।

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यदि \(A=\{2,4,6\}\) और \(B=\{1,2\}\) हैं, तो \(A\times B\) में कितने युग्मों का दूसरा घटक (B) का सबसे बड़ा तत्व है?

If \(A=\{2,4,6\}\) and \(B=\{1,2\}\), how many pairs in \(A\times B\) have the largest element of (B) as the second component?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

The largest element of (B) is (2), and the (3) elements of (A) can be first components with it. For a fixed second component, the answer is (n(A)).

Step 2

Why this answer is correct

The correct answer is B. (3). The largest element of (B) is (2), and the (3) elements of (A) can be first components with it. For a fixed second component, the answer is (n(A)).

Step 3

Exam Tip

(B) का सबसे बड़ा तत्व (2) है और उसके साथ (A) के (3) तत्व पहले घटक बन सकते हैं। निश्चित दूसरे घटक के लिए उत्तर (n(A)) होता है।

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यदि \(A=\{1,2\}\) और \(B=\{2,3\}\) हैं, तो \(A\times B\) में दोनों घटकों का योग (4) होने वाले कितने युग्म हैं?

If \(A=\{1,2\}\) and \(B=\{2,3\}\), how many pairs in \(A\times B\) have sum of both components equal to (4)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

The pairs are ((1,3)) and ((2,2)), and both have sum (4). In condition-based questions, first think of all possible pairs.

Step 2

Why this answer is correct

The correct answer is B. (2). The pairs are ((1,3)) and ((2,2)), and both have sum (4). In condition-based questions, first think of all possible pairs.

Step 3

Exam Tip

ऐसे युग्म ((1,3)) और ((2,2)) हैं, दोनों का योग (4) है। शर्त वाले प्रश्न में पहले सभी संभव युग्म सोचें।

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यदि \(A=\{1,3\}\) और \(B=\{2,4\}\) हैं, तो \(A\times B\) में दोनों घटकों का योग विषम होने वाले कितने युग्म हैं?

If \(A=\{1,3\}\) and \(B=\{2,4\}\), how many pairs in \(A\times B\) have an odd sum of components?

Explanation opens after your attempt
Correct Answer

C. (4)

Step 1

Concept

Elements of (A) are odd and elements of (B) are even, so every sum is odd. The total number of pairs is \(2\times 2=4\).

Step 2

Why this answer is correct

The correct answer is C. (4). Elements of (A) are odd and elements of (B) are even, so every sum is odd. The total number of pairs is \(2\times 2=4\).

Step 3

Exam Tip

(A) के तत्व विषम और (B) के तत्व सम हैं, इसलिए हर योग विषम होगा। कुल युग्म \(2\times 2=4\) हैं।

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यदि \(A=\{2,4\}\) और \(B=\{1,3\}\) हैं, तो \(A\times B\) में दोनों घटकों का गुणनफल सम होने वाले कितने युग्म हैं?

If \(A=\{2,4\}\) and \(B=\{1,3\}\), how many pairs in \(A\times B\) have an even product of components?

Explanation opens after your attempt
Correct Answer

C. (4)

Step 1

Concept

The first component is always even, so the product in every pair is even. There are \(2\times 2=4\) pairs in total.

Step 2

Why this answer is correct

The correct answer is C. (4). The first component is always even, so the product in every pair is even. There are \(2\times 2=4\) pairs in total.

Step 3

Exam Tip

पहला घटक हमेशा सम है, इसलिए हर युग्म का गुणनफल सम होगा। कुल \(2\times 2=4\) युग्म हैं।

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यदि \(A=\{1,2,3\}\) और \(B=\{1,2\}\) हैं, तो \(A\times B\) में पहले घटक के दूसरे घटक से बड़ा होने वाले कितने युग्म हैं?

If \(A=\{1,2,3\}\) and \(B=\{1,2\}\), how many pairs in \(A\times B\) have first component greater than second component?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The pairs are ((2,1),(3,1),(3,2)). In comparison questions, do not reverse the order of \(A\times B\).

Step 2

Why this answer is correct

The correct answer is C. (3). The pairs are ((2,1),(3,1),(3,2)). In comparison questions, do not reverse the order of \(A\times B\).

Step 3

Exam Tip

ऐसे युग्म ((2,1),(3,1),(3,2)) हैं। तुलना वाले प्रश्न में \(A\times B\) का क्रम न बदलें।

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यदि \(A=\{1,2\}\) और \(B=\{1,2,3\}\) हैं, तो \(A\times B\) में पहले घटक के दूसरे घटक के बराबर होने वाले कितने युग्म हैं?

If \(A=\{1,2\}\) and \(B=\{1,2,3\}\), how many pairs in \(A\times B\) have first component equal to second component?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

The equal-component pairs are ((1,1)) and ((2,2)). In such questions, common elements of both sets are useful.

Step 2

Why this answer is correct

The correct answer is B. (2). The equal-component pairs are ((1,1)) and ((2,2)). In such questions, common elements of both sets are useful.

Step 3

Exam Tip

समान घटक वाले युग्म ((1,1)) और ((2,2)) हैं। ऐसे प्रश्न में दोनों समुच्चयों के साझा तत्व काम आते हैं।

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यदि \(A=\{0,1,2\}\) और \(B=\{2,3\}\) हैं, तो \(A\times B\) में दोनों घटकों का अंतर (1) होने वाले कितने क्रमित युग्म हैं?

If \(A=\{0,1,2\}\) and \(B=\{2,3\}\), how many ordered pairs in \(A\times B\) have the difference of both components equal to (1)?

Explanation opens after your attempt
Correct Answer

B. (2) युग्म(2) pairs

Step 1

Concept

The pairs are ((1,2)) and ((2,3)), where the difference between the second and first component is (1). In condition-based questions, first list possible pairs and then check.

Step 2

Why this answer is correct

The correct answer is B. (2) युग्म / (2) pairs. The pairs are ((1,2)) and ((2,3)), where the difference between the second and first component is (1). In condition-based questions, first list possible pairs and then check.

Step 3

Exam Tip

ऐसे युग्म ((1,2)) और ((2,3)) हैं, जिनमें दूसरे घटक और पहले घटक का अंतर (1) है। शर्त वाले प्रश्न में पहले संभव युग्म बनाकर जांचें।

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FAQs

Class 11 Mathematics Quiz FAQs

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