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