यदि (n\(A^{c}\)=12) और (n(U)=30), तो (n(A)) क्या है?
If (n\(A^{c}\)=12) and (n(U)=30), what is (n(A))?
Explanation opens after your attempt
B. (18)
Concept
(n(A)=n(U)-n\(A^{c}\)=30-12=18). The cardinalities of a set and its complement add to the total.
Why this answer is correct
The correct answer is B. (18). (n(A)=n(U)-n\(A^{c}\)=30-12=18). The cardinalities of a set and its complement add to the total.
Exam Tip
(n(A)=n(U)-n\(A^{c}\)=30-12=18)। पूरक और समुच्चय की अवयव संख्या मिलकर कुल देती है।
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