math
posted by corey .
A car license plate consists of 6 characters. The first 3 characters are letters excluding I, O, Q and U. The last 3 characters are any of the numerals 0 to 9 inclusive. How many different license plates are possible?
Please show your work.

Repetitions are permitted.
For the letters, there are 264=22 choices for each character.
For the numbers, there are 10 choices for each digit.
Total number of different licence plates
= 22^3*10^3 
thank you so much. how come it wouldn't be 22P3*10P3?

When "Repetitions are permitted", you'd think of powers.