How many four–letter permutations can be formed from the letters of the word OHIO?
Since two letters are the same, you will divide n!, or the total number of letters in the word, by
number of different words possible =
So, 12 four word permutations are possible with the letters in the word Ohio.
Find the number of combinations of the letters in the word CIVIC
Find the number of combinations of the letters in the word PINEAPPLE
Hopefully you understand!