(14) विद्यार्थियों में से (7) की टीम बनानी है जिसमें (3) विशेष विद्यार्थी या तो सभी शामिल हों या सभी बाहर हों। कितने तरीके हैं?

From (14) students a team of (7) is to be formed in which (3) special students are either all included or all excluded. How many ways are there?

Explanation opens after your attempt
Correct Answer

B. (660)

Step 1

Concept

If all special students are included there are \(\binom{11}{4}=330\) ways and if all are excluded there are \(\binom{11}{7}=330\) ways. The total is (660).

Step 2

Why this answer is correct

The correct answer is B. (660). If all special students are included there are \(\binom{11}{4}=330\) ways and if all are excluded there are \(\binom{11}{7}=330\) ways. The total is (660).

Step 3

Exam Tip

सभी विशेष शामिल हों तो \(\binom{11}{4}=330\) और सभी बाहर हों तो \(\binom{11}{7}=330\) तरीके हैं। कुल (660) है।

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Mathematics Answer, Explanation and Revision Hints

(14) विद्यार्थियों में से (7) की टीम बनानी है जिसमें (3) विशेष विद्यार्थी या तो सभी शामिल हों या सभी बाहर हों। कितने तरीके हैं? / From (14) students a team of (7) is to be formed in which (3) special students are either all included or all excluded. How many ways are there?

Correct Answer: B. (660). Explanation: सभी विशेष शामिल हों तो \(\binom{11}{4}=330\) और सभी बाहर हों तो \(\binom{11}{7}=330\) तरीके हैं। कुल (660) है। / If all special students are included there are \(\binom{11}{4}=330\) ways and if all are excluded there are \(\binom{11}{7}=330\) ways. The total is (660).

Which concept should I revise for this Mathematics MCQ?

If all special students are included there are \(\binom{11}{4}=330\) ways and if all are excluded there are \(\binom{11}{7}=330\) ways. The total is (660).

What exam hint can help solve this Mathematics question?

सभी विशेष शामिल हों तो \(\binom{11}{4}=330\) और सभी बाहर हों तो \(\binom{11}{7}=330\) तरीके हैं। कुल (660) है।