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
Correct Answer

B. (49)

Step 1

Concept

Total subsets are \(2^6=64\), and exactly two-element subsets are \(\binom{6}{2}=15\). So the answer is (64-15=49).

Step 2

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).

Step 3

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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Mathematics Answer, Explanation and Revision Hints

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?

Correct Answer: B. (49). Explanation: कुल उपसमुच्चय \(2^6=64\) हैं और ठीक (2) तत्व वाले \(\binom{6}{2}=15\) हैं। इसलिए उत्तर (64-15=49) है। / Total subsets are \(2^6=64\), and exactly two-element subsets are \(\binom{6}{2}=15\). So the answer is (64-15=49).

Which concept should I revise for this Mathematics MCQ?

Total subsets are \(2^6=64\), and exactly two-element subsets are \(\binom{6}{2}=15\). So the answer is (64-15=49).

What exam hint can help solve this Mathematics question?

कुल उपसमुच्चय \(2^6=64\) हैं और ठीक (2) तत्व वाले \(\binom{6}{2}=15\) हैं। इसलिए उत्तर (64-15=49) है।