(13) छात्रों में से (6) छात्रों का चयन करना है। (5) विशेष छात्रों में से कम से कम (1) शामिल हो। कितने तरीके हैं?
From (13) students (6) students are to be selected. At least (1) of (5) special students must be included. How many ways are there?
Explanation opens after your attempt
Correct Answer
D. (3003)
Concept
Total ways are \(\binom{13}{6}=1716\) and ways with no special student are \(\binom{8}{6}=28\). Hence (1716-28=1688) ways.
Why this answer is correct
The correct answer is D. (3003). Total ways are \(\binom{13}{6}=1716\) and ways with no special student are \(\binom{8}{6}=28\). Hence (1716-28=1688) ways.
Exam Tip
कुल \(\binom{13}{6}=1716\) हैं और कोई विशेष न हो तो \(\binom{8}{6}=28\) हैं। इसलिए (1716-28=1688) तरीके हैं।
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