यदि \(A=\{1,2,3\}\) है, तो (\mathcal{P}(A)) में कितने अरिक्त तत्व होंगे?
If \(A=\{1,2,3\}\), how many non-empty elements are there in (\mathcal{P}(A))?
Explanation opens after your attempt
Correct Answer
C. (7)
Concept
Total subsets are \(2^3=8\), and only \(\varnothing\) is empty. So non-empty subsets are (8-1=7).
Why this answer is correct
The correct answer is C. (7). Total subsets are \(2^3=8\), and only \(\varnothing\) is empty. So non-empty subsets are (8-1=7).
Exam Tip
कुल उपसमुच्चय \(2^3=8\) हैं और केवल \(\varnothing\) रिक्त है। इसलिए अरिक्त उपसमुच्चय (8-1=7) हैं।
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