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Mathematics Venn Diagrams MCQ Questions for Class 11 Science

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Venn Diagrams Practice Questions

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वेन आरेख में आयत सामान्यतः किस समुच्चय को दर्शाता है?

In a Venn diagram, what does the rectangle usually represent?

Explanation opens after your attempt
Correct Answer

A. सार्वत्रिक समुच्चय (U)Universal set (U)

Step 1

Concept

In a Venn diagram, the whole rectangle represents (U). In exams, all other sets are considered inside this (U).

Step 2

Why this answer is correct

The correct answer is A. सार्वत्रिक समुच्चय (U) / Universal set (U). In a Venn diagram, the whole rectangle represents (U). In exams, all other sets are considered inside this (U).

Step 3

Exam Tip

वेन आरेख में पूरा आयत (U) को दर्शाता है। परीक्षा में बाकी सभी समुच्चय इसी (U) के अंदर माने जाते हैं।

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यदि (n(A)=18), (n(B)=20), और (n\(A\cap B\)=6), तो (n\(A\cup B\)) क्या होगा?

If (n(A)=18), (n(B)=20), and (n\(A\cap B\)=6), what will (n\(A\cup B\)) be?

Explanation opens after your attempt
Correct Answer

A. (32)

Step 1

Concept

Using (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)), we get (18+20-6=32). Subtract the common part once to avoid double counting.

Step 2

Why this answer is correct

The correct answer is A. (32). Using (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)), we get (18+20-6=32). Subtract the common part once to avoid double counting.

Step 3

Exam Tip

सूत्र (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)) से (18+20-6=32) मिलता है। साझा भाग को दो बार गिनने से बचने के लिए एक बार घटाएं।

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वेन आरेख में दो वृत्तों का समान भाग किसे दर्शाता है?

In a Venn diagram, what does the common part of two circles represent?

Explanation opens after your attempt
Correct Answer

B. \(A\cap B\)

Step 1

Concept

The shared part of two circles is \(A\cap B\). Remember that common part means intersection.

Step 2

Why this answer is correct

The correct answer is B. \(A\cap B\). The shared part of two circles is \(A\cap B\). Remember that common part means intersection.

Step 3

Exam Tip

दो वृत्तों का साझा भाग \(A\cap B\) होता है। याद रखें कि साझा भाग का मतलब प्रतिच्छेद है।

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यदि (n(U)=45) और (n\(A\cup B\)=29), तो वेन आरेख में न (A) न (B) वाले क्षेत्र में कितने अवयव होंगे?

If (n(U)=45) and (n\(A\cup B\)=29), how many elements will be in the region neither in (A) nor in (B) in the Venn diagram?

Explanation opens after your attempt
Correct Answer

A. (16)

Step 1

Concept

The region neither in (A) nor in (B) is (\(A\cup B\)'), so the number is (45-29=16). It is outside both circles but inside (U).

Step 2

Why this answer is correct

The correct answer is A. (16). The region neither in (A) nor in (B) is (\(A\cup B\)'), so the number is (45-29=16). It is outside both circles but inside (U).

Step 3

Exam Tip

न (A) न (B) वाला क्षेत्र (\(A\cup B\)') है, इसलिए संख्या (45-29=16) होगी। यह दोनों वृत्तों के बाहर लेकिन (U) के अंदर का भाग है।

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वेन आरेख में \(A\cup B\) किस क्षेत्र को दर्शाता है?

Which region does \(A\cup B\) represent in a Venn diagram?

Explanation opens after your attempt
Correct Answer

C. (A) या (B) या दोनों(A) or (B) or both

Step 1

Concept

\(A\cup B\) includes all regions of (A) and (B). In exams, take the complete area of both circles for union.

Step 2

Why this answer is correct

The correct answer is C. (A) या (B) या दोनों / (A) or (B) or both. \(A\cup B\) includes all regions of (A) and (B). In exams, take the complete area of both circles for union.

Step 3

Exam Tip

\(A\cup B\) में (A) और (B) के सभी क्षेत्र आते हैं। परीक्षा में संघ के लिए दोनों वृत्तों का पूरा भाग लें।

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यदि \(A=\{1,2,3,4,5\}\) और \(B=\{4,5,6,7\}\), तो वेन आरेख में केवल (A) वाला क्षेत्र कौन सा है?

If \(A=\{1,2,3,4,5\}\) and \(B=\{4,5,6,7\}\), which is the only (A) region in the Venn diagram?

Explanation opens after your attempt
Correct Answer

A. ({1,2,3})

Step 1

Concept

Only (A) means (A-B), so after removing (4,5) of (B), ({1,2,3}) remains. In a Venn diagram, the only region is outside the common part.

Step 2

Why this answer is correct

The correct answer is A. ({1,2,3}). Only (A) means (A-B), so after removing (4,5) of (B), ({1,2,3}) remains. In a Venn diagram, the only region is outside the common part.

Step 3

Exam Tip

केवल (A) का अर्थ (A-B) है, इसलिए (B) के (4,5) हटाने पर ({1,2,3}) बचता है। वेन आरेख में केवल वाला भाग साझा क्षेत्र के बाहर होता है।

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वेन आरेख में (A') किस क्षेत्र को दर्शाता है?

Which region does (A') represent in a Venn diagram?

Explanation opens after your attempt
Correct Answer

B. (A) के बाहर लेकिन (U) के अंदर का भागPart outside (A) but inside (U)

Step 1

Concept

(A') contains the elements of (U) that are not in (A). Complement is always taken with respect to (U).

Step 2

Why this answer is correct

The correct answer is B. (A) के बाहर लेकिन (U) के अंदर का भाग / Part outside (A) but inside (U). (A') contains the elements of (U) that are not in (A). Complement is always taken with respect to (U).

Step 3

Exam Tip

(A') में (U) के वे अवयव आते हैं जो (A) में नहीं हैं। पूरक हमेशा (U) के सापेक्ष लिया जाता है।

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यदि (n(A)=12), (n(B)=9), और (n\(A\cap B\)=4), तो (n\(A\cup B\)) क्या है?

If (n(A)=12), (n(B)=9), and (n\(A\cap B\)=4), what is (n\(A\cup B\))?

Explanation opens after your attempt
Correct Answer

A. (17)

Step 1

Concept

Using (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)), we get (12+9-4=17). The common part must be subtracted once.

Step 2

Why this answer is correct

The correct answer is A. (17). Using (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)), we get (12+9-4=17). The common part must be subtracted once.

Step 3

Exam Tip

सूत्र (n\(A\cup B\)=n(A)+n(B)-n\(A\cap B\)) से (12+9-4=17) मिलता है। साझा भाग को एक बार घटाना जरूरी है।

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यदि (n(A)=20), (n(B)=15), और (n\(A\cup B\)=28), तो (n\(A\cap B\)) क्या है?

If (n(A)=20), (n(B)=15), and (n\(A\cup B\)=28), what is (n\(A\cap B\))?

Explanation opens after your attempt
Correct Answer

B. (7)

Step 1

Concept

(n\(A\cap B\)=20+15-28=7). To find intersection of two sets, subtract the union from the sum.

Step 2

Why this answer is correct

The correct answer is B. (7). (n\(A\cap B\)=20+15-28=7). To find intersection of two sets, subtract the union from the sum.

Step 3

Exam Tip

(n\(A\cap B\)=20+15-28=7) होगा। दो समुच्चयों में प्रतिच्छेद निकालने के लिए संघ को घटाएं।

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यदि (n(U)=30), (n(A)=11), तो (n(A')) क्या होगा?

If (n(U)=30) and (n(A)=11), what will (n(A')) be?

Explanation opens after your attempt
Correct Answer

B. (19)

Step 1

Concept

(n(A')=n(U)-n(A)=30-11=19). In a Venn diagram, (A') means the part outside (A).

Step 2

Why this answer is correct

The correct answer is B. (19). (n(A')=n(U)-n(A)=30-11=19). In a Venn diagram, (A') means the part outside (A).

Step 3

Exam Tip

(n(A')=n(U)-n(A)=30-11=19)। वेन आरेख में (A') का अर्थ (A) के बाहर का भाग है।

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FAQs

Venn Diagrams FAQs

How can I practice Venn Diagrams MCQs?

Select Easy, Medium, Hard or Expert topic quiz on this page and answer topic-wise questions with explanations.

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