(10) विद्यार्थियों में से (4) विद्यार्थियों की टीम बनानी है जिसमें एक विशेष विद्यार्थी शामिल न हो। कितने तरीके हैं?

A team of (4) students is to be formed from (10) students excluding one special student. How many ways are there?

Explanation opens after your attempt
Correct Answer

B. (126)

Step 1

Concept

After excluding the special student (9) students remain. So the number of ways is \(\binom{9}{4}=126\).

Step 2

Why this answer is correct

The correct answer is B. (126). After excluding the special student (9) students remain. So the number of ways is \(\binom{9}{4}=126\).

Step 3

Exam Tip

विशेष विद्यार्थी को हटाने पर (9) विद्यार्थी बचते हैं। इसलिए \(\binom{9}{4}=126\) तरीके होंगे।

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Mathematics Answer, Explanation and Revision Hints

(10) विद्यार्थियों में से (4) विद्यार्थियों की टीम बनानी है जिसमें एक विशेष विद्यार्थी शामिल न हो। कितने तरीके हैं? / A team of (4) students is to be formed from (10) students excluding one special student. How many ways are there?

Correct Answer: B. (126). Explanation: विशेष विद्यार्थी को हटाने पर (9) विद्यार्थी बचते हैं। इसलिए \(\binom{9}{4}=126\) तरीके होंगे। / After excluding the special student (9) students remain. So the number of ways is \(\binom{9}{4}=126\).

Which concept should I revise for this Mathematics MCQ?

After excluding the special student (9) students remain. So the number of ways is \(\binom{9}{4}=126\).

What exam hint can help solve this Mathematics question?

विशेष विद्यार्थी को हटाने पर (9) विद्यार्थी बचते हैं। इसलिए \(\binom{9}{4}=126\) तरीके होंगे।