- #1
azizlwl
- 1,066
- 10
Homework Statement
1. (a) A shelf contains 6 separate compartments. In how many ways can 4 distinguishable marbles be placed in the compartments?(b) Work the problem if there are n compartments and r marbles. This type of problem arises in physics in connection with Bose-Einstein statistics.
Ans.
(a) 126 (b)n+r-1(C)n-1
The Attempt at a Solution
a) 1 1 1 1 - 6.5.4.3/4! = 15
1 1 2 -6.5.4/2! = 60
1 3 -6.5 = 30
2 2 -6.5/2! = 15
4 -6 = 6
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= 126
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(b) ?. Hope somebody can help me.