यदि \(A=\{g,h,i,j\}\) है, तो (\mathcal{P}(A)) के कितने तत्व (A) के उचित उपसमुच्चय भी हैं?
If \(A=\{g,h,i,j\}\), how many elements of (\mathcal{P}(A)) are also proper subsets of (A)?
Explanation opens after your attempt
B. (15)
Concept
(\mathcal{P}(A)) has \(2^4=16\) elements. For proper subsets, remove only (A) itself, so (15) remain.
Why this answer is correct
The correct answer is B. (15). (\mathcal{P}(A)) has \(2^4=16\) elements. For proper subsets, remove only (A) itself, so (15) remain.
Exam Tip
(\mathcal{P}(A)) में कुल \(2^4=16\) तत्व हैं। उचित उपसमुच्चय के लिए केवल (A) को हटाते हैं, इसलिए (15) बचते हैं।
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