SOLUTION: a Particular company,any valid password consists of 8 characters in any order as follow 4 distinct lower case letter, two distinct digits and any two (distinct) of the special c

Question 1146146: a Particular company,any valid password consists of 8 characters in any order as follow
4 distinct lower case letter,
two distinct digits and
any two (distinct) of the special characters
~ ! @ - # $ ; % ^ & * ? : < \ [ { ] } + = _ >
How many valid passwords are there if no repeats are allowed (that is, each character can only be used at most once)?

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
26 lower case letters 4
10 distinct digits 2
23 special characters 2
26*25*24*23*10*9*23*22=16,339,752,000
(American style) 16 billion 339 million 752 thousand
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