तीन समुच्चयों में (n(A)=90), (n(B)=84), (n(C)=78), (n\(A\cap B\)=36), (n\(B\cap C\)=32), (n\(C\cap A\)=30) और (n\(A\cap B\cap C\)=13) है। (n\(A\cup B\cup C\)) कितना है?
For three sets (n(A)=90), (n(B)=84), (n(C)=78), (n\(A\cap B\)=36), (n\(B\cap C\)=32), (n\(C\cap A\)=30), and (n\(A\cap B\cap C\)=13). What is (n\(A\cup B\cup C\))?
Explanation opens after your attempt
Correct Answer
B. (167)
Concept
The union of three sets is (90+84+78-36-32-30+13=167). After subtracting pairwise intersections, add the central part.
Why this answer is correct
The correct answer is B. (167). The union of three sets is (90+84+78-36-32-30+13=167). After subtracting pairwise intersections, add the central part.
Exam Tip
तीन समुच्चयों का संघ (90+84+78-36-32-30+13=167) है। जोड़ी प्रतिच्छेद घटाने के बाद केंद्रीय भाग जोड़ें।
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