(9) अवयवों वाले समुच्चय में (3) विशेष अवयव हैं। (5) अवयवों के कितने उपसमुच्चय ठीक (2) विशेष अवयव रखते हैं?

A set of (9) elements has (3) special elements. How many (5)-element subsets contain exactly (2) special elements?

Explanation opens after your attempt
Correct Answer

C. (60)

Step 1

Concept

The selection is \( \binom{3}{2}\binom{6}{3}=60 \). With exactly (2) special elements, take the remaining (3) from ordinary elements.

Step 2

Why this answer is correct

The correct answer is C. (60). The selection is \( \binom{3}{2}\binom{6}{3}=60 \). With exactly (2) special elements, take the remaining (3) from ordinary elements.

Step 3

Exam Tip

चयन \( \binom{3}{2}\binom{6}{3}=60 \) है। ठीक (2) विशेष होने पर बाकी (3) सामान्य अवयवों से लें।

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Mathematics Answer, Explanation and Revision Hints

(9) अवयवों वाले समुच्चय में (3) विशेष अवयव हैं। (5) अवयवों के कितने उपसमुच्चय ठीक (2) विशेष अवयव रखते हैं? / A set of (9) elements has (3) special elements. How many (5)-element subsets contain exactly (2) special elements?

Correct Answer: C. (60). Explanation: चयन \( \binom{3}{2}\binom{6}{3}=60 \) है। ठीक (2) विशेष होने पर बाकी (3) सामान्य अवयवों से लें। / The selection is \( \binom{3}{2}\binom{6}{3}=60 \). With exactly (2) special elements, take the remaining (3) from ordinary elements.

Which concept should I revise for this Mathematics MCQ?

The selection is \( \binom{3}{2}\binom{6}{3}=60 \). With exactly (2) special elements, take the remaining (3) from ordinary elements.

What exam hint can help solve this Mathematics question?

चयन \( \binom{3}{2}\binom{6}{3}=60 \) है। ठीक (2) विशेष होने पर बाकी (3) सामान्य अवयवों से लें।