यदि (n\(A\cup B\)=128), (n\(A\cap B\)=32) और (n(A-B)=45) है, तो (n(B)) कितना होगा?

If (n\(A\cup B\)=128), (n\(A\cap B\)=32), and (n(A-B)=45), what is (n(B))?

Explanation opens after your attempt
Correct Answer

C. (83)

Step 1

Concept

First (n(B-A)=128-45-32=51), then (n(B)=51+32=83). (B) contains only (B) and the common part.

Step 2

Why this answer is correct

The correct answer is C. (83). First (n(B-A)=128-45-32=51), then (n(B)=51+32=83). (B) contains only (B) and the common part.

Step 3

Exam Tip

पहले (n(B-A)=128-45-32=51), फिर (n(B)=51+32=83)। (B) में केवल (B) और साझा भाग दोनों आते हैं।

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Mathematics Answer, Explanation and Revision Hints

यदि (n\(A\cup B\)=128), (n\(A\cap B\)=32) और (n(A-B)=45) है, तो (n(B)) कितना होगा? / If (n\(A\cup B\)=128), (n\(A\cap B\)=32), and (n(A-B)=45), what is (n(B))?

Correct Answer: C. (83). Explanation: पहले (n(B-A)=128-45-32=51), फिर (n(B)=51+32=83)। (B) में केवल (B) और साझा भाग दोनों आते हैं। / First (n(B-A)=128-45-32=51), then (n(B)=51+32=83). (B) contains only (B) and the common part.

Which concept should I revise for this Mathematics MCQ?

First (n(B-A)=128-45-32=51), then (n(B)=51+32=83). (B) contains only (B) and the common part.

What exam hint can help solve this Mathematics question?

पहले (n(B-A)=128-45-32=51), फिर (n(B)=51+32=83)। (B) में केवल (B) और साझा भाग दोनों आते हैं।