यदि \(A\subseteq U\), (|U|=7), और (|\mathcal{P}(A')|=8) है, तो (|A|) कितना होगा?
If \(A\subseteq U\), (|U|=7), and (|\mathcal{P}(A')|=8), what is (|A|)?
Explanation opens after your attempt
Correct Answer
C. (4)
Concept
(|\mathcal{P}(A')|=8=23), so (|A'|=3) and (|A|=7-3=4). In exams, identify (n) from \(2^n\).
Why this answer is correct
The correct answer is C. (4). (|\mathcal{P}(A')|=8=23), so (|A'|=3) and (|A|=7-3=4). In exams, identify (n) from \(2^n\).
Exam Tip
(|\mathcal{P}(A')|=8=23), इसलिए (|A'|=3) और (|A|=7-3=4)। परीक्षा में \(2^n\) से (n) पहचानें।
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