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IgorLugansk [536]

3 years ago

9

How many license plates can be made using 2 digits then 5 letters if repeated digits and letters are not allowed?

1 answer:

sveta [45]3 years ago

3 0

In this question, we made a license that does not allow repeated digit and letter. That means the probability count of letter and digit will be decreased by 1 for every roll.
There is 10 kinds of digits (0-9) and 26 kinds of letters (a to z). So, 2 digits and 5 letter would be:
(10 * 9) * (26 * 25 * 24 * 23 * 22)= 710424000 kinds of license plates

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