यदि (n(A)=52), (n(B)=47), (n\(A\cap B\)=21) और (n(U)=80), तो (n(\(A\cup B\)')) क्या है?

If (n(A)=52), (n(B)=47), (n\(A\cap B\)=21), and (n(U)=80), what is (n(\(A\cup B\)'))?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

(n\(A\cup B\)=52+47-21=78). Therefore the number outside is (80-78=2).

Step 2

Why this answer is correct

The correct answer is A. (2). (n\(A\cup B\)=52+47-21=78). Therefore the number outside is (80-78=2).

Step 3

Exam Tip

(n\(A\cup B\)=52+47-21=78)। अतः बाहर के तत्व (80-78=2) हैं।

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Mathematics Answer, Explanation and Revision Hints

यदि (n(A)=52), (n(B)=47), (n\(A\cap B\)=21) और (n(U)=80), तो (n(\(A\cup B\)')) क्या है? / If (n(A)=52), (n(B)=47), (n\(A\cap B\)=21), and (n(U)=80), what is (n(\(A\cup B\)'))?

Correct Answer: A. (2). Explanation: (n\(A\cup B\)=52+47-21=78)। अतः बाहर के तत्व (80-78=2) हैं। / (n\(A\cup B\)=52+47-21=78). Therefore the number outside is (80-78=2).

Which concept should I revise for this Mathematics MCQ?

(n\(A\cup B\)=52+47-21=78). Therefore the number outside is (80-78=2).

What exam hint can help solve this Mathematics question?

(n\(A\cup B\)=52+47-21=78)। अतः बाहर के तत्व (80-78=2) हैं।