a) How many different license plates are possible if repeats are allowed from each contains 3...

a) How many different license plates are possible if repeats are allowed from each contains 3 letters (out of the first 15 letters of the alphabet) followed by 2 digits (0~9)?

b) How many of these license plates contain different letters and different digits?

Expert Solution

a) 15*15*15*10*10 = 337500

b) 15*14*13*10*9 = 245700

orchestra answered 2 years ago

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