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Mathematics, 04.10.2019 22:20, Jojo8421
1. a computer system uses passwords that contain exactly eight characters, and each character is one of the 26 lowercase letters (a-z), or 26 uppercase letters (a-z) or 10 integers (0-9). let ω denote the set of all possible passwords, and let a and b denote the events that consist of passwords with only letters or only integers, respectively. suppose that all passwords in ω are equally likely. determine the following probabilities: (a) p(a|b′) (b) p(a′ ∩b)
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