यदि (n(\mathcal{P}(A))=32) और (n(U)=13), तो (A') के (2)-तत्वीय उपसमुच्चयों की संख्या कितनी है?
If (n(\mathcal{P}(A))=32) and (n(U)=13), how many (2)-element subsets does (A') have?
Explanation opens after your attempt
Correct Answer
B. (28)
Concept
Since \(2^{n(A)}=32\), (n(A)=5) and (n(A')=8). The number of (2)-element subsets of (A') is \(\binom{8}{2}=28\).
Why this answer is correct
The correct answer is B. (28). Since \(2^{n(A)}=32\), (n(A)=5) and (n(A')=8). The number of (2)-element subsets of (A') is \(\binom{8}{2}=28\).
Exam Tip
\(2^{n(A)}=32\), इसलिए (n(A)=5) और (n(A')=8)। (A') के (2)-तत्वीय उपसमुच्चय \(\binom{8}{2}=28\) होंगे।
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