How many distinct Permutations of the letters of the word OTTAWA begin and end with the letter T?
This is the same as asking how many distinct permutations are there of the
letters OAWA.
If all the letters were distinct there would be 4! such permutations, but in this
case this will count each permutation twice as there are 2! permuutations of
the A's counted for each distinct perm of the letters.
RonL