यदि (n(A\cap\(B\cup C\))=52), केवल \(A\cap B\) में (23) और केवल \(A\cap C\) में (18) तत्व हैं, तो (n\(A\cap B\cap C\)) कितना है?
If (n(A\cap\(B\cup C\))=52), only \(A\cap B\) has (23) and only \(A\cap C\) has (18) elements, then what is (n\(A\cap B\cap C\))?
Explanation opens after your attempt
A. (11)
Concept
(A\cap\(B\cup C\)) includes only \(A\cap B\), only \(A\cap C\), and the centre, so the centre is (52-23-18=11).
Why this answer is correct
The correct answer is A. (11). (A\cap\(B\cup C\)) includes only \(A\cap B\), only \(A\cap C\), and the centre, so the centre is (52-23-18=11).
Exam Tip
(A\cap\(B\cup C\)) में केवल \(A\cap B\), केवल \(A\cap C\) और केंद्र आते हैं, इसलिए केंद्र (52-23-18=11) है।
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