यदि (n(U)=60), (n(A)=32), (n(B)=27) और (n\(A\cap B\)=11), तो (n(\(A\cup B\)')) क्या है?
If (n(U)=60), (n(A)=32), (n(B)=27) and (n\(A\cap B\)=11), what is (n(\(A\cup B\)'))?
Explanation opens after your attempt
A. (12)
Concept
(n\(A\cup B\)=32+27-11=48), so the complement has (60-48=12) elements. Find the union first, then subtract from (U).
Why this answer is correct
The correct answer is A. (12). (n\(A\cup B\)=32+27-11=48), so the complement has (60-48=12) elements. Find the union first, then subtract from (U).
Exam Tip
(n\(A\cup B\)=32+27-11=48), इसलिए पूरक में (60-48=12) तत्व हैं। पहले संघ निकालें फिर (U) से घटाएं।
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