यदि \(A=\{3,6,9,12\}\) है, तो (\mathcal{P}(A)) में कितने अरिक्त तत्व होंगे?
If \(A=\{3,6,9,12\}\), how many non-empty elements are there in (\mathcal{P}(A))?
Explanation opens after your attempt
B. (15)
Concept
Total subsets are \(2^4=16\). Only \(\varnothing\) is empty so there are (15) non-empty subsets.
Why this answer is correct
The correct answer is B. (15). Total subsets are \(2^4=16\). Only \(\varnothing\) is empty so there are (15) non-empty subsets.
Exam Tip
कुल उपसमुच्चय \(2^4=16\) हैं। केवल \(\varnothing\) रिक्त है इसलिए अरिक्त उपसमुच्चय (15) होंगे।
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