तीन समुच्चयों में (n(A)=35), (n(B)=32), (n(C)=29), (n\(A\cap B\)=12), (n\(B\cap C\)=10), (n\(C\cap A\)=9) और (n\(A\cap B\cap C\)=4) है। (n\(A\cup B\cup C\)) कितना है?
For three sets, (n(A)=35), (n(B)=32), (n(C)=29), (n\(A\cap B\)=12), (n\(B\cap C\)=10), (n\(C\cap A\)=9), and (n\(A\cap B\cap C\)=4). What is (n\(A\cup B\cup C\))?
Explanation opens after your attempt
A. (69)
Concept
The union of three sets is (35+32+29-12-10-9+4=69). Adding back the final common part is necessary.
Why this answer is correct
The correct answer is A. (69). The union of three sets is (35+32+29-12-10-9+4=69). Adding back the final common part is necessary.
Exam Tip
तीन समुच्चयों का संघ (35+32+29-12-10-9+4=69) है। अंतिम साझा भाग को वापस जोड़ना जरूरी है।
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