How many eight character passwords are there if each character is either an uppercase letter AZ, a lowercase letter az, or a digit 09, and where at least one character of each of the three types is used?
First how many total 8 character passwords are possible?
Second how many 8 character passwords without any digits are possible?
Third how many 8 character passwords without any lowercase letters are possible?
Finally how many 8 character passwords without any uppercase letters are possible?
The answer should be



; correct?