(10) सदस्यों में से (4) सदस्यों की समिति बनानी है जिसमें एक निश्चित सदस्य अवश्य हो। कितने तरीके हैं?
A committee of (4) members is to be formed from (10) members with one fixed member included. How many ways are there?
Explanation opens after your attempt
A. (84)
Concept
The fixed member is already selected, so choose the remaining (3) from (9). The ways are \(\binom{9}{3}=84\).
Why this answer is correct
The correct answer is A. (84). The fixed member is already selected, so choose the remaining (3) from (9). The ways are \(\binom{9}{3}=84\).
Exam Tip
निश्चित सदस्य पहले से चुना है इसलिए बाकी (3) सदस्य (9) में से चुनेंगे। तरीके \(\binom{9}{3}=84\) हैं।
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