A committee of (4) members is to be formed from (10) members with one fixed member included. How many ways are there?(10) सदस्यों में से (4) सदस्यों की समिति बनानी है जिसमें एक निश्चित सदस्य अवश्य हो। कितने तरीके हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (84)(84)
The fixed member is already selected, so choose the remaining (3) from (9). The ways are (\binom{9}{3}=84).निश्चित सदस्य पहले से चुना है इसलिए बाकी (3) सदस्य (9) में से चुनेंगे। तरीके (\binom{9}{3}=84) हैं।
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