यदि (n(A-B)=13) और (n\(A\cap B\)=7), तो (n(A)) क्या है?

If (n(A-B)=13) and (n\(A\cap B\)=7), what is (n(A))?

Explanation opens after your attempt
Correct Answer

B. (20)

Step 1

Concept

(A) is made of two disjoint parts (A-B) and \(A\cap B\). Hence (n(A)=13+7=20).

Step 2

Why this answer is correct

The correct answer is B. (20). (A) is made of two disjoint parts (A-B) and \(A\cap B\). Hence (n(A)=13+7=20).

Step 3

Exam Tip

(A) दो अलग भागों (A-B) और \(A\cap B\) से बनता है। इसलिए (n(A)=13+7=20)।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि (n(A-B)=13) और (n\(A\cap B\)=7), तो (n(A)) क्या है? / If (n(A-B)=13) and (n\(A\cap B\)=7), what is (n(A))?

Correct Answer: B. (20). Explanation: (A) दो अलग भागों (A-B) और \(A\cap B\) से बनता है। इसलिए (n(A)=13+7=20)। / (A) is made of two disjoint parts (A-B) and \(A\cap B\). Hence (n(A)=13+7=20).

Which concept should I revise for this Mathematics MCQ?

(A) is made of two disjoint parts (A-B) and \(A\cap B\). Hence (n(A)=13+7=20).

What exam hint can help solve this Mathematics question?

(A) दो अलग भागों (A-B) और \(A\cap B\) से बनता है। इसलिए (n(A)=13+7=20)।