यदि \(A\cup A^c=U\) और \(A\cap A^c=\varnothing\), तो (n(A)+n\(A^c\)) किसके बराबर है?
If \(A\cup A^c=U\) and \(A\cap A^c=\varnothing\), then (n(A)+n\(A^c\)) is equal to what?
Explanation opens after your attempt
A. (n(U))
Concept
(A) and \(A^c\) are disjoint and together form (U). Therefore the sum of their cardinalities is (n(U)).
Why this answer is correct
The correct answer is A. (n(U)). (A) and \(A^c\) are disjoint and together form (U). Therefore the sum of their cardinalities is (n(U)).
Exam Tip
(A) और \(A^c\) असंबद्ध हैं और मिलकर (U) बनाते हैं। इसलिए उनकी संख्याओं का योग (n(U)) होता है।
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