(13) विद्यार्थियों में से (5) चुनने हैं ताकि (3) विशेष विद्यार्थियों में से कोई भी शामिल न हो। कितने तरीके हैं?
From (13) students (5) are to be selected so that none of (3) special students is included. How many ways are there?
Explanation opens after your attempt
A. (252)
Concept
After removing (3) special students (10) students remain. Hence there are \(\binom{10}{5}=252\) ways.
Why this answer is correct
The correct answer is A. (252). After removing (3) special students (10) students remain. Hence there are \(\binom{10}{5}=252\) ways.
Exam Tip
(3) विशेष विद्यार्थियों को हटाने पर (10) विद्यार्थी बचते हैं। इसलिए \(\binom{10}{5}=252\) तरीके हैं।
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