यदि \(U=\{1,2,3,4,5,6,7,8,9,10,11,12\}\) और \(A=\{3,6,9,12\}\) है, तो (A') में कितने अवयव हैं?
If \(U=\{1,2,3,4,5,6,7,8,9,10,11,12\}\) and \(A=\{3,6,9,12\}\), how many elements are in (A')?
Explanation opens after your attempt
A. (8)
Concept
(n(U)=12) and (n(A)=4), so (n(A')=12-4=8). Subtract from the total number in (U).
Why this answer is correct
The correct answer is A. (8). (n(U)=12) and (n(A)=4), so (n(A')=12-4=8). Subtract from the total number in (U).
Exam Tip
(n(U)=12) और (n(A)=4), इसलिए (n(A')=12-4=8)। गणना में (U) की कुल संख्या से घटाएं।
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