(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
Correct Answer

A. (84)

Step 1

Concept

The fixed member is already selected, so choose the remaining (3) from (9). The ways are \(\binom{9}{3}=84\).

Step 2

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 \(\binom{9}{3}=84\).

Step 3

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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Mathematics Answer, Explanation and Revision Hints

(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?

Correct Answer: A. (84). Explanation: निश्चित सदस्य पहले से चुना है इसलिए बाकी (3) सदस्य (9) में से चुनेंगे। तरीके \(\binom{9}{3}=84\) हैं। / The fixed member is already selected, so choose the remaining (3) from (9). The ways are \(\binom{9}{3}=84\).

Which concept should I revise for this Mathematics MCQ?

The fixed member is already selected, so choose the remaining (3) from (9). The ways are \(\binom{9}{3}=84\).

What exam hint can help solve this Mathematics question?

निश्चित सदस्य पहले से चुना है इसलिए बाकी (3) सदस्य (9) में से चुनेंगे। तरीके \(\binom{9}{3}=84\) हैं।