A computer password consists of six characters. a) how many different passwords are possible if each character may be any lowercase letter or digit? b) how many different passwords are possible if each character may be any lowercase letter or digit, and at least one character must be a digit? c) a computer system requires that passwords contain at least one digit. If seven characters are generated at random, and each is equally likely to be any of the 26 letters or 10 digits,what is the probability that a valid password will be generated?

A computer password consists of six characters. a) how many different passwords are possible if each character may be any lowercase letter or digit? b) how many different passwords are possible if each character may be any lowercase letter or digit, and at least one character must be a digit? c) a computer system requires that passwords contain at least one digit. If seven characters are generated at random, and each is equally likely to be any of the 26 letters or 10 digits,what is the probability that a valid password will be generated?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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