Posted by **Diana** on Wednesday, July 29, 2009 at 6:53pm.

how many 4 character license plates are possible with 2 letters of the alphabet followed by 2 digits, it repetitions are allowed?

if repetitions are not allowed?

- math -
**MathMate**, Wednesday, July 29, 2009 at 7:12pm
Assuming all 26 letters are used, there is a choice of 25 letters for the first character, 26 for the second, 10 for the third, and 9 for the fourth.

The total number is the product of the four numbers.

- math -
**MathMate**, Wednesday, July 29, 2009 at 7:13pm
If repetitions are allowed, the choies are 26,26,10,10.

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