A computer password is required to be 5 characters long. How many passwords are possible if the password requires 2 letter(s) followed by 3 digits (numbers 0-9), where no repetition of any letter or digit is allowed? There are possible passwords.
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Since repetition is not allowed, the number of ways to choose the first letter is 26 and the second letter is 25. So, the total number of ways to choose 2 letters is 26*25 = 650. Show more…
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