यदि \(A=\{1,2,3,4,5\}\) है, तो (\mathcal{P}(A)) में ऐसे कितने तत्व हैं जिनमें (2) हो लेकिन (5) न हो?
If \(A=\{1,2,3,4,5\}\), how many elements of (\mathcal{P}(A)) contain (2) but not (5)?
Explanation opens after your attempt
B. (8)
Concept
Including (2) and excluding (5) are fixed. For the remaining (1,3,4), there are \(2^3=8\) choices.
Why this answer is correct
The correct answer is B. (8). Including (2) and excluding (5) are fixed. For the remaining (1,3,4), there are \(2^3=8\) choices.
Exam Tip
(2) रखना और (5) हटाना निश्चित है। बचे (1,3,4) के लिए \(2^3=8\) विकल्प हैं।
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