(9) खिलाड़ियों में से (4) खिलाड़ियों का चयन करना है। एक कप्तान पहले से तय है और उसे चुना नहीं जाना है। कितने तरीके हैं?

From (9) players (4) players are to be selected. One captain is already fixed and must not be selected. How many ways are there?

Explanation opens after your attempt
Correct Answer

B. (70)

Step 1

Concept

After removing the captain (8) players remain. Hence there are \(\binom{8}{4}=70\) ways.

Step 2

Why this answer is correct

The correct answer is B. (70). After removing the captain (8) players remain. Hence there are \(\binom{8}{4}=70\) ways.

Step 3

Exam Tip

कप्तान को हटाने पर (8) खिलाड़ी बचते हैं। इसलिए \(\binom{8}{4}=70\) तरीके हैं।

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Mathematics Answer, Explanation and Revision Hints

(9) खिलाड़ियों में से (4) खिलाड़ियों का चयन करना है। एक कप्तान पहले से तय है और उसे चुना नहीं जाना है। कितने तरीके हैं? / From (9) players (4) players are to be selected. One captain is already fixed and must not be selected. How many ways are there?

Correct Answer: B. (70). Explanation: कप्तान को हटाने पर (8) खिलाड़ी बचते हैं। इसलिए \(\binom{8}{4}=70\) तरीके हैं। / After removing the captain (8) players remain. Hence there are \(\binom{8}{4}=70\) ways.

Which concept should I revise for this Mathematics MCQ?

After removing the captain (8) players remain. Hence there are \(\binom{8}{4}=70\) ways.

What exam hint can help solve this Mathematics question?

कप्तान को हटाने पर (8) खिलाड़ी बचते हैं। इसलिए \(\binom{8}{4}=70\) तरीके हैं।