The call letter of a radio station must have 4 letters.The first letter must be a K or a W. How many different station call setters can be made if repetitions are not allowed? If repetitions are allowed?
With no repetition, there are 2 choices for the first letter
25 choices for the second
24 choices for the third
23 choices for the last.
Use the multiplication rule to find the total number of possible names.