Suppose that a password for a computer system must have exactly 8 characters. a.

Question

Suppose that a password for a computer system must have exactly 8 characters.
a. how many passwords are possible that only use lower-case alphabetic characters.
b. how many passwords are possible that can use either upper and lower case characters.
c. how many passwords are possible that use a combination of upper and lower case character as well as exactly one numeric digit in the last position.
d. how many passwords are possible that use a combination of upper and lower case characters as well as exactly one numeric digit if the position of the numeric digit is variable.

Explanation / Answer

a. 26^8 b. 52^8 c. 52^7*26 d. 52^7*26*8 C 1 (8 C 1 is 8)

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