यदि (n(U)=90), (n\(A\cap B\)=25), तो (n(\(A\cap B\)')) क्या है?
If (n(U)=90) and (n\(A\cap B\)=25), what is (n(\(A\cap B\)'))?
Explanation opens after your attempt
B. (65)
Concept
(\(A\cap B\)') contains all elements of (U) except the common part. Therefore, the number is (90-25=65).
Why this answer is correct
The correct answer is B. (65). (\(A\cap B\)') contains all elements of (U) except the common part. Therefore, the number is (90-25=65).
Exam Tip
(\(A\cap B\)') में साझा भाग को छोड़कर (U) के बाकी अवयव आते हैं। इसलिए संख्या (90-25=65) है।
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