Concept-wise Practice

nested sets MCQ Questions for Class 11

nested sets se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

25 questions tagged with nested sets.

यदि \(A\subseteq B\subseteq C\subseteq U\) है, तो (\(A\cup B\cup C\)') किसके बराबर होगा?

If \(A\subseteq B\subseteq C\subseteq U\), then (\(A\cup B\cup C\)') is equal to what?

Explanation opens after your attempt
Correct Answer

A. (C')

Step 1

Concept

In the chain, the union is the largest set (C), so its complement is (C'). Simplify the union first.

Step 2

Why this answer is correct

The correct answer is A. (C'). In the chain, the union is the largest set (C), so its complement is (C'). Simplify the union first.

Step 3

Exam Tip

श्रृंखला में संघ सबसे बड़ा समुच्चय (C) है, इसलिए उसका पूरक (C') होगा। पहले संघ को सरल करें।

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यदि \(A\cap B=A\) और \(B\cap C=B\) है, तो \(A\cap C\) किसके बराबर होगा?

If \(A\cap B=A\) and \(B\cap C=B\), then what is \(A\cap C\) equal to?

Explanation opens after your attempt
Correct Answer

A. (A)

Step 1

Concept

First \(A\subseteq B\) and \(B\subseteq C\), so \(A\subseteq C\). Therefore, \(A\cap C=A\).

Step 2

Why this answer is correct

The correct answer is A. (A). First \(A\subseteq B\) and \(B\subseteq C\), so \(A\subseteq C\). Therefore, \(A\cap C=A\).

Step 3

Exam Tip

पहले \(A\subseteq B\) और \(B\subseteq C\) मिलता है, इसलिए \(A\subseteq C\)। अतः \(A\cap C=A\) है।

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यदि \(A\subseteq B\subseteq C\) है, तो \(A\cap B\cap C\) किसके बराबर होगा?

If \(A\subseteq B\subseteq C\), then \(A\cap B\cap C\) is equal to what?

Explanation opens after your attempt
Correct Answer

A. (A)

Step 1

Concept

The smallest set (A) is common to all three sets. Therefore, \(A\cap B\cap C=A\).

Step 2

Why this answer is correct

The correct answer is A. (A). The smallest set (A) is common to all three sets. Therefore, \(A\cap B\cap C=A\).

Step 3

Exam Tip

सबसे छोटा समुच्चय (A) तीनों में समान रूप से मौजूद है। इसलिए \(A\cap B\cap C=A\) है।

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यदि (A), (B) और (C) के लिए \(A\subseteq B\subseteq C\) है, तो \(A\cup B\cup C\) किसके बराबर होगा?

If (A), (B) and (C) satisfy \(A\subseteq B\subseteq C\), then \(A\cup B\cup C\) is equal to what?

Explanation opens after your attempt
Correct Answer

A. (C)

Step 1

Concept

All sets are inside (C), so their union is (C). In a subset chain, the largest set gives the union.

Step 2

Why this answer is correct

The correct answer is A. (C). All sets are inside (C), so their union is (C). In a subset chain, the largest set gives the union.

Step 3

Exam Tip

सभी समुच्चय (C) के भीतर हैं, इसलिए उनका संघ (C) ही होगा। उपसमुच्चय श्रृंखला में सबसे बड़ा समुच्चय संघ देता है।

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यदि \(A\subseteq B\subseteq C\), (n(C)=132), (n(B)=84) और (n(A)=37) है, तो (n(C-A)) कितना होगा?

If \(A\subseteq B\subseteq C\), (n(C)=132), (n(B)=84), and (n(A)=37), what is (n(C-A))?

Explanation opens after your attempt
Correct Answer

C. (95)

Step 1

Concept

Since (A) lies completely inside (C), (n(C-A)=132-37=95). Subtract only the set being removed.

Step 2

Why this answer is correct

The correct answer is C. (95). Since (A) lies completely inside (C), (n(C-A)=132-37=95). Subtract only the set being removed.

Step 3

Exam Tip

क्योंकि (A) पूरा (C) में है, इसलिए (n(C-A)=132-37=95)। हटाए गए समुच्चय को ही घटाएं।

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यदि \(A\subseteq B\subseteq C\), (n(C)=118), (n(B)=73) और (n(A)=29) है, तो (n(C-A)) कितना होगा?

If \(A\subseteq B\subseteq C\), (n(C)=118), (n(B)=73), and (n(A)=29), what is (n(C-A))?

Explanation opens after your attempt
Correct Answer

C. (89)

Step 1

Concept

Since (A) lies fully inside (C), (n(C-A)=118-29=89). In a nested Venn diagram, subtract only the set being removed.

Step 2

Why this answer is correct

The correct answer is C. (89). Since (A) lies fully inside (C), (n(C-A)=118-29=89). In a nested Venn diagram, subtract only the set being removed.

Step 3

Exam Tip

क्योंकि (A) पूरा (C) में है, इसलिए (n(C-A)=118-29=89)। nested वेन आरेख में जिस समुच्चय को हटाना हो केवल वही घटाएं।

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यदि \(A\subseteq B\subseteq C\), (n(C)=95), (n(B)=61) और (n(A)=28) है, तो (n(C-B)) कितना होगा?

If \(A\subseteq B\subseteq C\), (n(C)=95), (n(B)=61), and (n(A)=28), what is (n(C-B))?

Explanation opens after your attempt
Correct Answer

A. (34)

Step 1

Concept

(B) lies completely inside (C), so (n(C-B)=95-61=34). In a nested Venn diagram, subtract the inner part from the larger set.

Step 2

Why this answer is correct

The correct answer is A. (34). (B) lies completely inside (C), so (n(C-B)=95-61=34). In a nested Venn diagram, subtract the inner part from the larger set.

Step 3

Exam Tip

(B) पूरा (C) के अंदर है, इसलिए (n(C-B)=95-61=34)। nested वेन आरेख में बड़े से अंदर वाले भाग को घटाएं।

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Question 8/25 Expert Mathematics Sets Class 11 Level 7

यदि A={∅,{∅},1} है, तो इनमें से कौन-सा P(A) का तत्व है लेकिन A का तत्व नहीं है?

If A={∅,{∅},1}, then which of the following is an element of P(A) but not an element of A?

Explanation opens after your attempt
Correct Answer

D. 1

Step 1

Concept

All elements of {1,{∅}} are in A, so it is a subset of A and an element of P(A). In exams, the elements of a power set are always subsets of the original set.

Step 2

Why this answer is correct

The correct answer is D. 1. All elements of {1,{∅}} are in A, so it is a subset of A and an element of P(A). In exams, the elements of a power set are always subsets of the original set.

Step 3

Exam Tip

{1,{∅}} के सभी तत्व A में हैं, इसलिए यह A का उपसमुच्चय है और P(A) का तत्व है। परीक्षा में घात समुच्चय के तत्व हमेशा मूल समुच्चय के उपसमुच्चय होते हैं।

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यदि \(A=\{{1,2},3\}\) है तो इनमें से कौन सा (A) का उपसमुच्चय है?

If \(A=\{{1,2},3\}\) then which of these is a subset of (A)?

Explanation opens after your attempt
Correct Answer

B. ({{1,2}})

Step 1

Concept

The elements of (A) are ({1,2}) and (3), so ({{1,2}}) is a subset of it. In exams identify complete objects inside the outer braces.

Step 2

Why this answer is correct

The correct answer is B. ({{1,2}}). The elements of (A) are ({1,2}) and (3), so ({{1,2}}) is a subset of it. In exams identify complete objects inside the outer braces.

Step 3

Exam Tip

(A) के तत्व ({1,2}) और (3) हैं इसलिए ({{1,2}}) इसका उपसमुच्चय है। परीक्षा में बड़े ब्रैकेट के अंदर के पूरे तत्व पहचानें।

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यदि \(A=\{{1,2},3,4\}\) है तो निम्न में से कौन (A) का उपसमुच्चय नहीं है?

If \(A=\{{1,2},3,4\}\), which of the following is not a subset of (A)?

Explanation opens after your attempt
Correct Answer

D. ({1,2})

Step 1

Concept

In (A), ({1,2}) is one element, but (1) and (2) are not separate elements. So ({1,2}) is not a subset.

Step 2

Why this answer is correct

The correct answer is D. ({1,2}). In (A), ({1,2}) is one element, but (1) and (2) are not separate elements. So ({1,2}) is not a subset.

Step 3

Exam Tip

(A) में ({1,2}) एक अवयव है पर (1) और (2) अलग से अवयव नहीं हैं। इसलिए ({1,2}) उपसमुच्चय नहीं है।

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यदि \(A=\{{1},{2},{1,2}\}\) है तो (A) के अवयवों में कौन सा शामिल है?

If \(A=\{{1},{2},{1,2}\}\), which one is included as an element of (A)?

Explanation opens after your attempt
Correct Answer

A. ({1,2})

Step 1

Concept

The elements of (A) are written as sets, and ({1,2}) is one of them. The inner (1) and (2) are not directly elements of (A).

Step 2

Why this answer is correct

The correct answer is A. ({1,2}). The elements of (A) are written as sets, and ({1,2}) is one of them. The inner (1) and (2) are not directly elements of (A).

Step 3

Exam Tip

(A) में अवयव समुच्चय के रूप में लिखे हैं और ({1,2}) उनमें से एक है। अंदर के (1) और (2) सीधे (A) के अवयव नहीं हैं।

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यदि \(A=\{1,2,{1,2}\}\) है तो (A) के कुल अवयव कितने हैं?

If \(A=\{1,2,{1,2}\}\), how many elements does (A) have?

Explanation opens after your attempt
Correct Answer

B. (3)

Step 1

Concept

Here (1), (2), and ({1,2}) are three distinct elements. A whole set can be an element of a larger set.

Step 2

Why this answer is correct

The correct answer is B. (3). Here (1), (2), and ({1,2}) are three distinct elements. A whole set can be an element of a larger set.

Step 3

Exam Tip

यहाँ (1), (2), और ({1,2}) तीन अलग अवयव हैं। पूरा समुच्चय भी किसी बड़े समुच्चय का अवयव हो सकता है।

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यदि \(A=\{1,2,{3,4}\}\) है तो निम्न में से कौन (A) का उपसमुच्चय है?

If \(A=\{1,2,{3,4}\}\), which of the following is a subset of (A)?

Explanation opens after your attempt
Correct Answer

B. ({2,{3,4}})

Step 1

Concept

Both (2) and ({3,4}) are elements of (A). Changing braces can change the element.

Step 2

Why this answer is correct

The correct answer is B. ({2,{3,4}}). Both (2) and ({3,4}) are elements of (A). Changing braces can change the element.

Step 3

Exam Tip

(2) और ({3,4}) दोनों (A) के अवयव हैं। कोष्ठक बदलने से अवयव बदल सकता है।

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

If \(A=\{1,2,3\}\) and \(B=\{1,2,3,{1}\}\), what is the relation between (A) and (B)?

Explanation opens after your attempt
Correct Answer

B. \(A\subset B\) और \(A\ne B\)\(A\subset B\) and \(A\ne B\)

Step 1

Concept

All elements of (A) are in (B), and (B) has the extra element ({1}). Treat ({1}) as different from (1).

Step 2

Why this answer is correct

The correct answer is B. \(A\subset B\) और \(A\ne B\) / \(A\subset B\) and \(A\ne B\). All elements of (A) are in (B), and (B) has the extra element ({1}). Treat ({1}) as different from (1).

Step 3

Exam Tip

(A) के सभी अवयव (B) में हैं और (B) में अतिरिक्त अवयव ({1}) है। ({1}) को (1) से अलग मानें।

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कौन सा विकल्प \(A=\{1,{2},3\}\) का उपसमुच्चय है?

Which option is a subset of \(A=\{1,{2},3\}\)?

Explanation opens after your attempt
Correct Answer

B. ({{2},3})

Step 1

Concept

The set (A) has ({2}) as an element but not (2). Therefore ({{2},3}) is a subset.

Step 2

Why this answer is correct

The correct answer is B. ({{2},3}). The set (A) has ({2}) as an element but not (2). Therefore ({{2},3}) is a subset.

Step 3

Exam Tip

(A) में ({2}) अवयव है पर (2) अवयव नहीं है। इसलिए ({{2},3}) उपसमुच्चय है।

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यदि \(A=\{1,2\}\) और \(B=\{{1,2}\}\) हैं तो कौन सा कथन सही है?

If \(A=\{1,2\}\) and \(B=\{{1,2}\}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

B. \(A\in B\)

Step 1

Concept

The only element of (B) is the whole set ({1,2}). Be careful with subset and element symbols.

Step 2

Why this answer is correct

The correct answer is B. \(A\in B\). The only element of (B) is the whole set ({1,2}). Be careful with subset and element symbols.

Step 3

Exam Tip

(B) का एकमात्र अवयव पूरा समुच्चय ({1,2}) है। उपसमुच्चय और अवयव के चिन्ह में सावधानी रखें।

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यदि \(A=\{1,2,{3}\}\) है तो कौन सा समुच्चय (A) के बराबर है?

If \(A=\{1,2,{3}\}\), which set is equal to (A)?

Explanation opens after your attempt
Correct Answer

A. ({2,{3},1})

Step 1

Concept

Changing order does not change a set but ({3}) and (3) are different. Identify nested elements carefully.

Step 2

Why this answer is correct

The correct answer is A. ({2,{3},1}). Changing order does not change a set but ({3}) and (3) are different. Identify nested elements carefully.

Step 3

Exam Tip

समुच्चय में क्रम बदलने से समुच्चय नहीं बदलता पर ({3}) और (3) अलग हैं। नेस्टेड अवयव को अलग पहचानें।

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यदि \(A={\varnothing,{\varnothing}}\) है तो (P(A)) में कौन सा अवयव अवश्य होगा?

If \(A={\varnothing,{\varnothing}}\) then which element must belong to (P(A))?

Explanation opens after your attempt
Correct Answer

A. \({{\varnothing}}\)

Step 1

Concept

Elements of (P(A)) are subsets of (A), and \({{\varnothing}}\) is a subset of (A). In a power set, elements are always subsets.

Step 2

Why this answer is correct

The correct answer is A. \({{\varnothing}}\). Elements of (P(A)) are subsets of (A), and \({{\varnothing}}\) is a subset of (A). In a power set, elements are always subsets.

Step 3

Exam Tip

(P(A)) में (A) के उपसमुच्चय अवयव बनते हैं और \({{\varnothing}}\) (A) का उपसमुच्चय है। पावर सेट में अवयव हमेशा उपसमुच्चय होते हैं।

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

If \(A=\{{1},{2}\}\) then which element will be in (P(A))?

Explanation opens after your attempt
Correct Answer

A. ({{1}})

Step 1

Concept

(P(A)) contains subsets of (A), and ({{1}}) is a subset of (A). ({1}) is an element of (A), but an element of the power set must be a subset.

Step 2

Why this answer is correct

The correct answer is A. ({{1}}). (P(A)) contains subsets of (A), and ({{1}}) is a subset of (A). ({1}) is an element of (A), but an element of the power set must be a subset.

Step 3

Exam Tip

(P(A)) में (A) के उपसमुच्चय होते हैं, और ({{1}}) (A) का उपसमुच्चय है। ({1}) (A) का अवयव है, पर पावर सेट का अवयव बनने के लिए उपसमुच्चय होना चाहिए।

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यदि \(A=\{1,2,3\}\) और \(B=\{{1},{2},{3}\}\) हैं तो कौन सा कथन सही है?

If \(A=\{1,2,3\}\) and \(B=\{{1},{2},{3}\}\) then which statement is correct?

Explanation opens after your attempt
Correct Answer

D. \(A\neq B\) और कोई भी दूसरे का उपसमुच्चय नहीं\(A\neq B\) and neither is a subset of the other

Step 1

Concept

Elements of (A) are numbers, while elements of (B) are singleton sets. Changing braces changes the set.

Step 2

Why this answer is correct

The correct answer is D. \(A\neq B\) और कोई भी दूसरे का उपसमुच्चय नहीं / \(A\neq B\) and neither is a subset of the other. Elements of (A) are numbers, while elements of (B) are singleton sets. Changing braces changes the set.

Step 3

Exam Tip

(A) के अवयव संख्याएं हैं जबकि (B) के अवयव एकल समुच्चय हैं। कोष्ठक बदलने से समुच्चय बदल जाता है।

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यदि \(A=\{1,{1,2},3\}\) है तो कौन सा कथन असत्य है?

If \(A=\{1,{1,2},3\}\) then which statement is false?

Explanation opens after your attempt
Correct Answer

D. \({1,2}\subseteq A\)

Step 1

Concept

For \({1,2}\subseteq A\), \(2\in A\) must be true, but (2) is not a separate element. Keep element and subset distinct.

Step 2

Why this answer is correct

The correct answer is D. \({1,2}\subseteq A\). For \({1,2}\subseteq A\), \(2\in A\) must be true, but (2) is not a separate element. Keep element and subset distinct.

Step 3

Exam Tip

\({1,2}\subseteq A\) के लिए \(2\in A\) होना चाहिए, पर (2) अलग अवयव नहीं है। अवयव और उपसमुच्चय में अंतर रखें।

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यदि \(A=\{1,2,{1,2}\}\) है तो कौन सा कथन असत्य है?

If \(A=\{1,2,{1,2}\}\) then which statement is false?

Explanation opens after your attempt
Correct Answer

C. \({1,2}\subseteq A\)

Step 1

Concept

This set has (1), (2), and ({1,2}) as elements. All four statements are actually true, so this question checks careful reading.

Step 2

Why this answer is correct

The correct answer is C. \({1,2}\subseteq A\). This set has (1), (2), and ({1,2}) as elements. All four statements are actually true, so this question checks careful reading.

Step 3

Exam Tip

({1,2}) (A) का अवयव है, पर इसके अवयव (1,2) से बना समुच्चय (A) का उपसमुच्चय भी हो सकता है; यहां विकल्प असत्य नहीं है। सही असत्य विकल्प नहीं दिखता, इसलिए ध्यान दें कि सभी दिए कथन सत्य हैं।

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यदि \(A={\varnothing,{1}}\) है तो कौन सा (A) का उपसमुच्चय है?

If \(A={\varnothing,{1}}\) then which is a subset of (A)?

Explanation opens after your attempt
Correct Answer

A. \({\varnothing}\)

Step 1

Concept

\(\varnothing\) is an element of (A), so \({\varnothing}\) is a subset of (A). ({1}) is an element, but (1) is not.

Step 2

Why this answer is correct

The correct answer is A. \({\varnothing}\). \(\varnothing\) is an element of (A), so \({\varnothing}\) is a subset of (A). ({1}) is an element, but (1) is not.

Step 3

Exam Tip

\(\varnothing\) (A) का अवयव है इसलिए \({\varnothing}\) (A) का उपसमुच्चय है। ({1}) अवयव है, पर (1) अवयव नहीं है।

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यदि \(A=\{1,{2},3\}\) है तो कौन सा कथन सत्य है?

If \(A=\{1,{2},3\}\) then which statement is true?

Explanation opens after your attempt
Correct Answer

A. \({2}\in A\)

Step 1

Concept

({2}) is one whole element, but (2) is not separately an element. Braces are very important in nested sets.

Step 2

Why this answer is correct

The correct answer is A. \({2}\in A\). ({2}) is one whole element, but (2) is not separately an element. Braces are very important in nested sets.

Step 3

Exam Tip

({2}) पूरा एक अवयव है, लेकिन (2) अलग से अवयव नहीं है। नेस्टेड समुच्चय में कोष्ठक बहुत महत्वपूर्ण होते हैं।

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

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

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

({1,2}) and ({2,1}) are equal sets.

Step 2

Why this answer is correct

Therefore the outer set actually has only one distinct element.

Step 3

Exam Tip

Order does not matter even inside a set that is itself an element. चरण 1: ({1,2}) और ({2,1}) समान समुच्चय हैं। चरण 2: इसलिए बाहरी समुच्चय में वास्तव में केवल एक अलग अवयव है। चरण 3: समुच्चय के अंदर भी क्रम का महत्व नहीं होता।

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