SOLUTION: How many different 4-letter radio station call codes are possible if each code must begin with K or W and no repetition of letters is permitted?

Question 281468: How many different 4-letter radio station call codes are possible if each code must begin with K or W and no repetition of letters is permitted?
Answer by brucewill(101) (Show Source): You can put this solution on YOUR website!
The first letter must me K or W, 2 choices.
The second letter must not be the first letter, 25 choices.
The third letter must not be either of the first two letters, 24 choices.
The fourth letter must not be either of the first 3 letters, 23 choices.

27600 possible combination.
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