यदि (n(A)=15) और (n(A')=35) है, तो (n(U)) क्या होगा?
If (n(A)=15) and (n(A')=35), what is (n(U))?
Explanation opens after your attempt
A. (50)
Concept
(A) and (A') together form (U), so (n(U)=15+35=50). This comes from \(A\cup A'=U\).
Why this answer is correct
The correct answer is A. (50). (A) and (A') together form (U), so (n(U)=15+35=50). This comes from \(A\cup A'=U\).
Exam Tip
(A) और (A') मिलकर (U) बनाते हैं, इसलिए (n(U)=15+35=50)। यह \(A\cup A'=U\) से आता है।
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