यदि \(U=\{a,b,c,d\}\) और \(A=\{a,d\}\) है तो (\mathcal{P}(A')) में कितने तत्व होंगे?
If \(U=\{a,b,c,d\}\) and \(A=\{a,d\}\), how many elements will (\mathcal{P}(A')) have?
Explanation opens after your attempt
Correct Answer
B. (4)
Concept
(A'={b,c}) has two elements. Hence (\mathcal{P}(A')) has \(2^2=4\) elements.
Why this answer is correct
The correct answer is B. (4). (A'={b,c}) has two elements. Hence (\mathcal{P}(A')) has \(2^2=4\) elements.
Exam Tip
(A'={b,c}) है जिसमें दो तत्व हैं। इसलिए (\mathcal{P}(A')) में \(2^2=4\) तत्व होंगे।
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