यदि \(A=\{1,2,3,4,5\}\), तो (\mathcal{P}(A)) में ठीक (2) या (3) तत्वों वाले कुल कितने उपसमुच्चय हैं?

If \(A=\{1,2,3,4,5\}\), how many subsets in (\mathcal{P}(A)) have exactly (2) or (3) elements?

Explanation opens after your attempt
Correct Answer

A. (20)

Step 1

Concept

The count is \(\binom{5}{2}+\binom{5}{3}=10+10=20\). In such questions, add the required sizes separately.

Step 2

Why this answer is correct

The correct answer is A. (20). The count is \(\binom{5}{2}+\binom{5}{3}=10+10=20\). In such questions, add the required sizes separately.

Step 3

Exam Tip

संख्या \(\binom{5}{2}+\binom{5}{3}=10+10=20\) है। ऐसे प्रश्नों में आकारों को अलग-अलग जोड़ें।

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यदि \(A=\{1,2,3,4,5\}\), तो (\mathcal{P}(A)) में ठीक (2) या (3) तत्वों वाले कुल कितने उपसमुच्चय हैं? / If \(A=\{1,2,3,4,5\}\), how many subsets in (\mathcal{P}(A)) have exactly (2) or (3) elements?

Correct Answer: A. (20). Explanation: संख्या \(\binom{5}{2}+\binom{5}{3}=10+10=20\) है। ऐसे प्रश्नों में आकारों को अलग-अलग जोड़ें। / The count is \(\binom{5}{2}+\binom{5}{3}=10+10=20\). In such questions, add the required sizes separately.

Which concept should I revise for this Mathematics MCQ?

The count is \(\binom{5}{2}+\binom{5}{3}=10+10=20\). In such questions, add the required sizes separately.

What exam hint can help solve this Mathematics question?

संख्या \(\binom{5}{2}+\binom{5}{3}=10+10=20\) है। ऐसे प्रश्नों में आकारों को अलग-अलग जोड़ें।