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union-complement-count MCQ Questions for Class 11

union-complement-count se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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2 questions tagged with union-complement-count.

Question 1/2 Easy Mathematics Sets Venn Diagrams Class 11 Level 15

यदि (n(U)=110), (n(A)=58), (n(B)=47), और (n\(A\cap B\)=20), तो (n(\(A\cup B\)')) क्या है?

If (n(U)=110), (n(A)=58), (n(B)=47), and (n\(A\cap B\)=20), what is (n(\(A\cup B\)'))?

Explanation opens after your attempt
Correct Answer

A. (25)

Step 1

Concept

First (n\(A\cup B\)=58+47-20=85). Therefore, (n(\(A\cup B\)')=110-85=25).

Step 2

Why this answer is correct

The correct answer is A. (25). First (n\(A\cup B\)=58+47-20=85). Therefore, (n(\(A\cup B\)')=110-85=25).

Step 3

Exam Tip

पहले (n\(A\cup B\)=58+47-20=85)। इसलिए (n(\(A\cup B\)')=110-85=25)।

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Question 2/2 Easy Mathematics Sets Venn Diagrams Class 11 Level 14

यदि (n(U)=100), (n(A)=45), (n(B)=40), और (n\(A\cap B\)=15), तो (n(\(A\cup B\)')) क्या है?

If (n(U)=100), (n(A)=45), (n(B)=40), and (n\(A\cap B\)=15), what is (n(\(A\cup B\)'))?

Explanation opens after your attempt
Correct Answer

A. (30)

Step 1

Concept

First, (n\(A\cup B\)=45+40-15=70). Therefore, (n(\(A\cup B\)')=100-70=30).

Step 2

Why this answer is correct

The correct answer is A. (30). First, (n\(A\cup B\)=45+40-15=70). Therefore, (n(\(A\cup B\)')=100-70=30).

Step 3

Exam Tip

पहले (n\(A\cup B\)=45+40-15=70)। इसलिए (n(\(A\cup B\)')=100-70=30)।

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