यदि \(A=\{x,y,z\}\) है, तो (\mathcal{P}(A)) में ऐसे कितने तत्व हैं जो (A) के उचित उपसमुच्चय भी हैं?
If \(A=\{x,y,z\}\), how many elements of (\mathcal{P}(A)) are also proper subsets of (A)?
Explanation opens after your attempt
C. (7)
Concept
(\mathcal{P}(A)) has (8) total subsets. For proper subsets, only (A) itself is removed, so (7) remain.
Why this answer is correct
The correct answer is C. (7). (\mathcal{P}(A)) has (8) total subsets. For proper subsets, only (A) itself is removed, so (7) remain.
Exam Tip
(\mathcal{P}(A)) में कुल (8) उपसमुच्चय हैं। उचित उपसमुच्चय के लिए केवल (A) को हटाते हैं, इसलिए (7) बचते हैं।
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