यदि \(U=\{1,2,3,4,5,6,7\}\), \(A=\{2,5,7\}\) और (B=A') है तो (B') क्या है?
If \(U=\{1,2,3,4,5,6,7\}\), \(A=\{2,5,7\}\) and (B=A'), what is (B')?
Explanation opens after your attempt
Correct Answer
A. ({2,5,7})
Concept
If (B=A'), then (B'=(A')'=A). Therefore (B'={2,5,7}).
Why this answer is correct
The correct answer is A. ({2,5,7}). If (B=A'), then (B'=(A')'=A). Therefore (B'={2,5,7}).
Exam Tip
यदि (B=A') है तो (B'=(A')'=A) होगा। इसलिए (B'={2,5,7}) है।
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