यदि (n(U)=20) और (n(A)=7) है, तो (n\(A^c\)) कितना होगा?
If (n(U)=20) and (n(A)=7), what is (n\(A^c\))?
Explanation opens after your attempt
A. (13)
Concept
If \(A\subseteq U\), then (n\(A^c\)=n(U)-n(A)). Therefore (20-7=13).
Why this answer is correct
The correct answer is A. (13). If \(A\subseteq U\), then (n\(A^c\)=n(U)-n(A)). Therefore (20-7=13).
Exam Tip
यदि \(A\subseteq U\) है, तो (n\(A^c\)=n(U)-n(A)) होता है। इसलिए (20-7=13) होगा।
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