(11) विद्यार्थियों में से (5) की टीम बनानी है जिसमें (2) विशेष विद्यार्थी दोनों शामिल हों या दोनों बाहर हों। कितने तरीके हैं?
From (11) students a team of (5) is to be formed in which (2) special students are either both included or both excluded. How many ways are there?
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C. (280)
Simple Explanation
दोनों शामिल हों तो \(\binom{9}{3}=84\) और दोनों बाहर हों तो \(\binom{9}{5}=126\) तरीके हैं। कुल (84+126=210) है। / If both are included there are \(\binom{9}{3}=84\) ways and if both are excluded there are \(\binom{9}{5}=126\) ways. The total is (210).
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