SOLUTION: How many ways can 15 offices be painted with 4 different colors? I tried to multiply 15 by 4 but I figured that 60 wasn't a big enough number.

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Question 260395: How many ways can 15 offices be painted with 4 different colors?
I tried to multiply 15 by 4 but I figured that 60 wasn't a big enough number.
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
we have 15c4 which is
15!/(4!*11!)
15*14*13*12/(4*3*2*1)
15*7*13 = 1365