यदि (n(A)=31), (n(B)=28) और (n\(A\cup B\)=46) है, तो (n\(A\cap B\)) कितना है?

If (n(A)=31), (n(B)=28), and (n\(A\cup B\)=46), what is (n\(A\cap B\))?

Explanation opens after your attempt
Correct Answer

A. (13)

Step 1

Concept

By the formula, (n\(A\cap B\)=31+28-46=13). When union is given, find the common part using this formula.

Step 2

Why this answer is correct

The correct answer is A. (13). By the formula, (n\(A\cap B\)=31+28-46=13). When union is given, find the common part using this formula.

Step 3

Exam Tip

सूत्र से (n\(A\cap B\)=31+28-46=13) है। संघ दिया हो तो सामान्य भाग इसी सूत्र से निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि (n(A)=31), (n(B)=28) और (n\(A\cup B\)=46) है, तो (n\(A\cap B\)) कितना है? / If (n(A)=31), (n(B)=28), and (n\(A\cup B\)=46), what is (n\(A\cap B\))?

Correct Answer: A. (13). Explanation: सूत्र से (n\(A\cap B\)=31+28-46=13) है। संघ दिया हो तो सामान्य भाग इसी सूत्र से निकालें। / By the formula, (n\(A\cap B\)=31+28-46=13). When union is given, find the common part using this formula.

Which concept should I revise for this Mathematics MCQ?

By the formula, (n\(A\cap B\)=31+28-46=13). When union is given, find the common part using this formula.

What exam hint can help solve this Mathematics question?

सूत्र से (n\(A\cap B\)=31+28-46=13) है। संघ दिया हो तो सामान्य भाग इसी सूत्र से निकालें।