(9) एक जैसी गेंदों को (3) अलग-अलग डिब्बों में रखना है ताकि किसी डिब्बे में (4) से अधिक गेंदें न हों। कितने तरीके होंगे?
(9) identical balls are to be placed into (3) distinct boxes so that no box has more than (4) balls. How many ways are possible?
Explanation opens after your attempt
B. (10)
Concept
Total distributions are \(^{11}C_{2}=55\). Subtract \(3\times{}^{6}C_{2}=45\) cases where one box has at least (5) balls, giving (10).
Why this answer is correct
The correct answer is B. (10). Total distributions are \(^{11}C_{2}=55\). Subtract \(3\times{}^{6}C_{2}=45\) cases where one box has at least (5) balls, giving (10).
Exam Tip
कुल \(^{11}C_{2}=55\) वितरण हैं। किसी एक डिब्बे में कम से कम (5) गेंदें होने वाले \(3\times{}^{6}C_{2}=45\) घटाएं, उत्तर (10)।
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