SOLUTION: in how many ways can 4 red, 3 yellow and 2 green discs be arranged in a row if the disc of same colour are indistinguishable?
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-> SOLUTION: in how many ways can 4 red, 3 yellow and 2 green discs be arranged in a row if the disc of same colour are indistinguishable?
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Question 1120229: in how many ways can 4 red, 3 yellow and 2 green discs be arranged in a row if the disc of same colour are indistinguishable? Answer by ikleyn(52781) (Show Source):
4 + 3 + 2 = 9.
The answer to this question is: in = = 1260 ways.
4! in the denominator accounts for 4 red indistinguishable disks;
3! in the denominator accounts for 3 yellow indistinguishable disks;
2! in the denominator accounts for 2 green indistinguishable disks.
