यदि (n(A)=48), (n(B)=52), (n(A-B)=17) और (n(B-A)=21) है, तो (n\(A\cap B\)) कितना होगा?

If (n(A)=48), (n(B)=52), (n(A-B)=17), and (n(B-A)=21), what is (n\(A\cap B\))?

Explanation opens after your attempt
Correct Answer

A. (31)

Step 1

Concept

(n\(A\cap B\)=n(A)-n(A-B)=48-17=31). From (B), (52-21=31) should also match.

Step 2

Why this answer is correct

The correct answer is A. (31). (n\(A\cap B\)=n(A)-n(A-B)=48-17=31). From (B), (52-21=31) should also match.

Step 3

Exam Tip

(n\(A\cap B\)=n(A)-n(A-B)=48-17=31)। (B) से भी (52-21=31) मिलना चाहिए।

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Mathematics Answer, Explanation and Revision Hints

यदि (n(A)=48), (n(B)=52), (n(A-B)=17) और (n(B-A)=21) है, तो (n\(A\cap B\)) कितना होगा? / If (n(A)=48), (n(B)=52), (n(A-B)=17), and (n(B-A)=21), what is (n\(A\cap B\))?

Correct Answer: A. (31). Explanation: (n\(A\cap B\)=n(A)-n(A-B)=48-17=31)। (B) से भी (52-21=31) मिलना चाहिए। / (n\(A\cap B\)=n(A)-n(A-B)=48-17=31). From (B), (52-21=31) should also match.

Which concept should I revise for this Mathematics MCQ?

(n\(A\cap B\)=n(A)-n(A-B)=48-17=31). From (B), (52-21=31) should also match.

What exam hint can help solve this Mathematics question?

(n\(A\cap B\)=n(A)-n(A-B)=48-17=31)। (B) से भी (52-21=31) मिलना चाहिए।