(7) लड़कों और (5) लड़कियों में से (5) विद्यार्थियों को चुनना है जिनमें ठीक (3) लड़के हों। कितने तरीके हैं?
From (7) boys and (5) girls (5) students are to be selected with exactly (3) boys. How many ways are there?
Explanation opens after your attempt
C. (350)
Concept
Exactly (3) boys and (2) girls are needed. The ways are \(\binom{7}{3}\binom{5}{2}=350\).
Why this answer is correct
The correct answer is C. (350). Exactly (3) boys and (2) girls are needed. The ways are \(\binom{7}{3}\binom{5}{2}=350\).
Exam Tip
ठीक (3) लड़के और (2) लड़कियां चाहिए। तरीके \(\binom{7}{3}\binom{5}{2}=350\) हैं।
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