P E P P E R

If we could tell the difference between the P's, and also tell
the difference between the E's, like this:

P E P P E R 

then the number of arrangements would be 6! or 720.  

However since the P's are indistinguishable,
each permutation of the 720, is counted too many times
as many as the number of ways the three P's can be arranged
in each permutation times the number of ways that the 2 E's can
be arranged in each permutation.  Therefore we divide by 3!*2!

Answer 

Edwin