तीन क्लबों में (n(A)=72), (n(B)=68), (n(C)=61), (n\(A\cap B\)=29), (n\(B\cap C\)=24), (n\(C\cap A\)=26) और (n\(A\cap B\cap C\)=11) है। केवल (B) में आने वाले सदस्य कितने हैं?

In three clubs (n(A)=72), (n(B)=68), (n(C)=61), (n\(A\cap B\)=29), (n\(B\cap C\)=24), (n\(C\cap A\)=26) and (n\(A\cap B\cap C\)=11). How many members are only in (B)?

Explanation opens after your attempt
Correct Answer

A. (26)

Step 1

Concept

Only (B=68-29-24+11=26). While subtracting two intersections, the centre is removed twice.

Step 2

Why this answer is correct

The correct answer is A. (26). Only (B=68-29-24+11=26). While subtracting two intersections, the centre is removed twice.

Step 3

Exam Tip

केवल (B=68-29-24+11=26) है। दो प्रतिच्छेद घटाते समय केंद्र दो बार घट जाता है।

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तीन क्लबों में (n(A)=72), (n(B)=68), (n(C)=61), (n\(A\cap B\)=29), (n\(B\cap C\)=24), (n\(C\cap A\)=26) और (n\(A\cap B\cap C\)=11) है। केवल (B) में आने वाले सदस्य कितने हैं? / In three clubs (n(A)=72), (n(B)=68), (n(C)=61), (n\(A\cap B\)=29), (n\(B\cap C\)=24), (n\(C\cap A\)=26) and (n\(A\cap B\cap C\)=11). How many members are only in (B)?

Correct Answer: A. (26). Explanation: केवल (B=68-29-24+11=26) है। दो प्रतिच्छेद घटाते समय केंद्र दो बार घट जाता है। / Only (B=68-29-24+11=26). While subtracting two intersections, the centre is removed twice.

Which concept should I revise for this Mathematics MCQ?

Only (B=68-29-24+11=26). While subtracting two intersections, the centre is removed twice.

What exam hint can help solve this Mathematics question?

केवल (B=68-29-24+11=26) है। दो प्रतिच्छेद घटाते समय केंद्र दो बार घट जाता है।