यदि (n\(A\cup B\)=136), (n(A-B)=49) और (n\(A\cap B\)=31) है, तो (n(B)) कितना होगा?

If (n\(A\cup B\)=136), (n(A-B)=49), and (n\(A\cap B\)=31), what is (n(B))?

Explanation opens after your attempt
Correct Answer

C. (87)

Step 1

Concept

First (n(B-A)=136-49-31=56), then (n(B)=56+31=87). (B) contains only (B) and the common part.

Step 2

Why this answer is correct

The correct answer is C. (87). First (n(B-A)=136-49-31=56), then (n(B)=56+31=87). (B) contains only (B) and the common part.

Step 3

Exam Tip

पहले (n(B-A)=136-49-31=56), फिर (n(B)=56+31=87)। (B) में केवल (B) और साझा भाग दोनों आते हैं।

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Mathematics Answer, Explanation and Revision Hints

यदि (n\(A\cup B\)=136), (n(A-B)=49) और (n\(A\cap B\)=31) है, तो (n(B)) कितना होगा? / If (n\(A\cup B\)=136), (n(A-B)=49), and (n\(A\cap B\)=31), what is (n(B))?

Correct Answer: C. (87). Explanation: पहले (n(B-A)=136-49-31=56), फिर (n(B)=56+31=87)। (B) में केवल (B) और साझा भाग दोनों आते हैं। / First (n(B-A)=136-49-31=56), then (n(B)=56+31=87). (B) contains only (B) and the common part.

Which concept should I revise for this Mathematics MCQ?

First (n(B-A)=136-49-31=56), then (n(B)=56+31=87). (B) contains only (B) and the common part.

What exam hint can help solve this Mathematics question?

पहले (n(B-A)=136-49-31=56), फिर (n(B)=56+31=87)। (B) में केवल (B) और साझा भाग दोनों आते हैं।