तीन समुच्चयों के लिए (n(A)=72), (n(B)=66), (n(C)=59), (n\(A\cap B\)=28), (n\(B\cap C\)=24), (n\(C\cap A\)=22) और (n\(A\cap B\cap C\)=9) है। (n\(A\cup B\cup C\)) कितना है?
For three sets (n(A)=72), (n(B)=66), (n(C)=59), (n\(A\cap B\)=28), (n\(B\cap C\)=24), (n\(C\cap A\)=22), and (n\(A\cap B\cap C\)=9). What is (n\(A\cup B\cup C\))?
Explanation opens after your attempt
A. (132)
Concept
The union of three sets is (72+66+59-28-24-22+9=132). After subtracting pairwise intersections, add the central part back.
Why this answer is correct
The correct answer is A. (132). The union of three sets is (72+66+59-28-24-22+9=132). After subtracting pairwise intersections, add the central part back.
Exam Tip
तीन समुच्चयों का संघ (72+66+59-28-24-22+9=132) है। जोड़ी प्रतिच्छेद घटाने के बाद केंद्रीय भाग वापस जोड़ें।
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