(10) लड़कों और (8) लड़कियों में से (7) विद्यार्थियों को चुनना है जिनमें ठीक (4) लड़कियां हों। कितने तरीके हैं?
From (10) boys and (8) girls (7) students are to be selected with exactly (4) girls. How many ways are there?
Explanation opens after your attempt
C. (8400)
Concept
Exactly (4) girls and (3) boys are needed. The ways are \(\binom{8}{4}\binom{10}{3}=8400\).
Why this answer is correct
The correct answer is C. (8400). Exactly (4) girls and (3) boys are needed. The ways are \(\binom{8}{4}\binom{10}{3}=8400\).
Exam Tip
ठीक (4) लड़कियां और (3) लड़के चाहिए। तरीके \(\binom{8}{4}\binom{10}{3}=8400\) हैं।
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