(9) लाल और (8) नीली गेंदों में से (6) गेंदें चुननी हैं जिनमें ठीक (3) लाल गेंदें हों। कितने तरीके हैं?
From (9) red and (8) blue balls (6) balls are to be selected with exactly (3) red balls. How many ways are there?
Explanation opens after your attempt
B. (4704)
Concept
Exactly (3) red and (3) blue balls are needed. The ways are \(\binom{9}{3}\binom{8}{3}=4704\).
Why this answer is correct
The correct answer is B. (4704). Exactly (3) red and (3) blue balls are needed. The ways are \(\binom{9}{3}\binom{8}{3}=4704\).
Exam Tip
ठीक (3) लाल और (3) नीली गेंदें चाहिए। तरीके \(\binom{9}{3}\binom{8}{3}=4704\) हैं।
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