यदि (n\(A\cup B\)=81), केवल (A) (29), और केवल (B) (34) है, तो (n\(A\cap B\)) क्या है?
If (n\(A\cup B\)=81), only (A) is (29), and only (B) is (34), what is (n\(A\cap B\))?
Explanation opens after your attempt
A. (18)
Concept
The union contains only (A), the common part, and only (B). Therefore the common part is (81-29-34=18).
Why this answer is correct
The correct answer is A. (18). The union contains only (A), the common part, and only (B). Therefore the common part is (81-29-34=18).
Exam Tip
संघ में केवल (A), साझा भाग और केवल (B) आते हैं। इसलिए साझा भाग (81-29-34=18) है।
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