11 letters in all
so, eliminating the P and S, there are 9 remaining.
4 I's, 3 S's
So, 9!/(4!3!) = 2520
Consider the letters MISSISSIPPI. How many permutations.
a) Begin with P and end with S.
2 answers
Why did you include the S's with the like letters but not the P's?
1 answer