यदि (n\(A\cup B\)=75), (n(A-B)=28) और (n(B-A)=31), तो (n\(A\cap B\)) क्या है?

If (n\(A\cup B\)=75), (n(A-B)=28), and (n(B-A)=31), what is (n\(A\cap B\))?

Explanation opens after your attempt
Correct Answer

A. (16)

Step 1

Concept

The union is made of disjoint parts (A-B), (B-A), and \(A\cap B\). So (75=28+31+x), hence (x=16).

Step 2

Why this answer is correct

The correct answer is A. (16). The union is made of disjoint parts (A-B), (B-A), and \(A\cap B\). So (75=28+31+x), hence (x=16).

Step 3

Exam Tip

संघ (A-B), (B-A) और \(A\cap B\) के असंबद्ध भागों से बनता है। इसलिए (75=28+31+x), अतः (x=16)।

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Mathematics Answer, Explanation and Revision Hints

यदि (n\(A\cup B\)=75), (n(A-B)=28) और (n(B-A)=31), तो (n\(A\cap B\)) क्या है? / If (n\(A\cup B\)=75), (n(A-B)=28), and (n(B-A)=31), what is (n\(A\cap B\))?

Correct Answer: A. (16). Explanation: संघ (A-B), (B-A) और \(A\cap B\) के असंबद्ध भागों से बनता है। इसलिए (75=28+31+x), अतः (x=16)। / The union is made of disjoint parts (A-B), (B-A), and \(A\cap B\). So (75=28+31+x), hence (x=16).

Which concept should I revise for this Mathematics MCQ?

The union is made of disjoint parts (A-B), (B-A), and \(A\cap B\). So (75=28+31+x), hence (x=16).

What exam hint can help solve this Mathematics question?

संघ (A-B), (B-A) और \(A\cap B\) के असंबद्ध भागों से बनता है। इसलिए (75=28+31+x), अतः (x=16)।