यदि (n\(A\cup B\cup C\)=118), (n(A)=45), (n(B)=50), (n(C)=55), (n\(A\cap B\)=18), (n\(B\cap C\)=20), (n\(C\cap A\)=16) है, तो (n\(A\cap B\cap C\)) कितना है?
If (n\(A\cup B\cup C\)=118), (n(A)=45), (n(B)=50), (n(C)=55), (n\(A\cap B\)=18), (n\(B\cap C\)=20), (n\(C\cap A\)=16), then what is (n\(A\cap B\cap C\))?
Explanation opens after your attempt
A. (22)
Concept
Using the formula (118=45+50+55-18-20-16+x), so (x=22). Let the unknown centre be (x) to form an equation easily.
Why this answer is correct
The correct answer is A. (22). Using the formula (118=45+50+55-18-20-16+x), so (x=22). Let the unknown centre be (x) to form an equation easily.
Exam Tip
सूत्र में (118=45+50+55-18-20-16+x), इसलिए (x=22) है। अज्ञात केंद्र को (x) मानकर समीकरण बनाना आसान है।
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