SOLUTION: A car license plate contains four letters followed by three digits. How many different plates can be made if no two adjacent letters can be the same, if the letter I cannot be one

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Question 1098513: A car license plate contains four letters followed by three digits. How many different plates can be made if no two adjacent letters can be the same, if the letter I cannot be one of the letters, and if the first of the three digits cannot be the number 0
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
25*24*24*24*9*10*10=311,040,000
This allows for any of the 25 other letters to be chosen first, and then the second letter can't be the one before it,so there are 24 choices for that, same for third and fourth.