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I want to choose a license plate which is 3 characters long, where the first character is a letter, the last character is a digit, and the middle is either a letter or a digit. I also want there to be two characters on my license plate which are the same. How many ways are there for me to choose a license plate with these restrictions?

 Sep 2, 2018
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I want to choose a license plate which is 3 characters long, where the first character is a letter, the last character is a digit, and the middle is either a letter or a digit. I also want there to be two characters on my license plate which are the same. How many ways are there for me to choose a license plate with these restrictions?

 

There are 10 digits and 26 letters

you either have

LLD  or    LDD

LLD       26*1*10=260

LDD       26*10*1=260

Total of 520 ways.

 Sep 3, 2018

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