Question: License plates are 7 characters long, broken down by 3 letters (a-z) followed by 4 numbers (0-9) a. How many license plates are possible? b.

License plates are 7 characters long, broken down by 3 letters (a-z) followed by 4 numbers (0-9) a. How many license plates are possible? b. How many license plates are possible if letters and numbers cannot be repeated? c. How many license plates are possible if the first three letters are RYZ followed by any 4 numbers? d. What two rules must all probability distributions follow to be considered valid

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