(n) identical balls को (r) distinct boxes में खाली box allowed होने पर बांटने का सूत्र क्या है?
What is the formula for distributing (n) identical balls into (r) distinct boxes when empty boxes are allowed?
Explanation opens after your attempt
C. \({}^{n+r-1}C_{r-1}\)
Concept
In stars and bars, (n) stars and (r-1) bars are arranged. In exams use the bars method for identical distribution.
Why this answer is correct
The correct answer is C. \({}^{n+r-1}C_{r-1}\). In stars and bars, (n) stars and (r-1) bars are arranged. In exams use the bars method for identical distribution.
Exam Tip
Stars and bars में (n) stars और (r-1) bars arrange होते हैं। परीक्षा में identical distribution में bars method लगाएं।
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