यदि (|\mathcal{P}(A)|=128) है, तो (|A|) का मान क्या होगा?
If (|\mathcal{P}(A)|=128), what is the value of (|A|)?
Explanation opens after your attempt
Correct Answer
B. (7)
Concept
If (|A|=n), then (|\mathcal{P}(A)|=2^n). Since \(128=2^7\), (|A|=7).
Why this answer is correct
The correct answer is B. (7). If (|A|=n), then (|\mathcal{P}(A)|=2^n). Since \(128=2^7\), (|A|=7).
Exam Tip
यदि (|A|=n), तो (|\mathcal{P}(A)|=2^n) होता है। \(128=2^7\), इसलिए (|A|=7)।
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