Question 1147188: A car license plate contains three letters followed by four digits. How many different plates can be made if no two consecutive letters can be the same, if the letters I, O and Q cannot be used, and if the number 0 cannot be used?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! A car license plate contains three letters followed by four digits. How many different plates can be made if no two consecutive letters can be the same, if the letters I, O and Q cannot be used, and if the number 0 cannot be used?
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Assuming only CAPS are used:
23 letters are used, and 9 numbers.
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The 1st letter is 1 of 23
The 2nd is 1 of 22
The 3rd is 1 of 22
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The 1st number is 1 of 9
Same for numbers 2, 3 & 4
---> 23*22*22*9*9*9*9
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