How many ways are there to distribute 12 indistinguishable balls into 9 distinguisable bins?
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Originally Posted by aaronrj How many ways are there to distribute 12 indistinguishable balls into 9 distinguisable bins? The number of ways distribute K indistinguishable balls into N distinguishable bins is $\displaystyle {{K+N-1} \choose K}$.
c(9+12-1, 12) = c(20, 12) = 20! / 8!12! = 125970 I GOT THAT BY LOOKING AT EXAMPLE 9 ON PAGE 377
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