SOLUTION: A signal can be formed by running different colored flags up a pole, one above the other. Find the number of different signals consisting of 8 flags that can be made using 4 white
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Question 1110534: A signal can be formed by running different colored flags up a pole, one above the other. Find the number of different signals consisting of 8 flags that can be made using 4 white flags, 2 red flags, and 2 blue flags. Answer by ikleyn(52777) (Show Source):
The problem asks how many distinguishable permutations/arrangements are possible of 8 flags, of which 4 are white, 2 are red and 2 are blue.
The total number of permutations of 8 flags is 8!.
Of them, the number of distinguishable arrangements /(signals) is = 420.
