SOLUTION: 6. A pass word consists of three letters followed by a three digit number. (a) How many passwords are possible if there are no restrictions? (b) How many passwords are possible i

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Question 399365: 6. A pass word consists of three letters followed by a three digit number.
(a) How many passwords are possible if there are no restrictions?
(b) How many passwords are possible if none of the letters or digits can be repeated?
(c) What is the probability of guessing the password in one trial if there are no restrictions
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
There are 26 letters and 10 digits.
a) N=26%2A26%2A26%2A10%2A10%2A10=17576000
b) N=26%2A25%2A24%2A10%2A9%2A8=11232000
c) P=1%2F17576000