Question: 3 . A password is to be created using 7 , 8 , or 9 characters. The characters must be either upper case, lower case,

3. A password is to be created using 7,8, or 9 characters. The characters must be either upper case, lower case, or digits.
a) How many passwords can be created without the letter R, if repetition is not allowed.
b) Create a list of rules for a password situation that would include between 4,000,000 and 16,000,000 possible passwords

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