यदि (A) में (6) तत्व हैं, तो (\mathcal{P}(A)) के कितने तत्वों में ठीक (2) तत्व नहीं होंगे?
If (A) has (6) elements, how many elements of (\mathcal{P}(A)) do not have exactly (2) elements?
Explanation opens after your attempt
B. (49)
Concept
Total subsets are \(2^6=64\), and exactly two-element subsets are \(\binom{6}{2}=15\). So the answer is (64-15=49).
Why this answer is correct
The correct answer is B. (49). Total subsets are \(2^6=64\), and exactly two-element subsets are \(\binom{6}{2}=15\). So the answer is (64-15=49).
Exam Tip
कुल उपसमुच्चय \(2^6=64\) हैं और ठीक (2) तत्व वाले \(\binom{6}{2}=15\) हैं। इसलिए उत्तर (64-15=49) है।
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