A license plate has exactly 2 letters and 3 digits. Each of the 3 digits must be separated from each other, and the letter A or B must appear (such as 3A4A5 or 3B4A5 or 3B4F5 but not 3C4D5). How many different plates are there?
Added by Luc-A E.
Step 1
Since the license plate must have either the letter A or B, there are 2 possibilities for the first letter and 1 possibility for the second letter. Therefore, there are a total of 2 * 1 = 2 possibilities for the letters. Show more…
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