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Probability
Jessie is creating a 10-character password that consists of numbers and letters (Each digit will be considered a character). He is not allowed to have repeated characters, but lower case letters and upper-case letters are allowed (ex. “a” and “A” will be considered different characters). a. How many different passwords can he create if “a” and “A” must be a part of the password.  b. How many different passwords can he create if there must be at least 8 digits in the password?

Jessie is creating a 10-character password that consists of numbers and letters (Each digit will be considered a character). He is not allowed to have repeated characters, but lower case letters and upper-case letters are allowed (ex. “a” and “A” will be considered different characters). a. How many different passwords can he create if “a” and “A” must be a part of the password.  b. How many different passwords can he create if there must be at least 8 digits in the password?

A First Course in Probability (10th Edition)
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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Jessie is creating a 10-character password that consists of
numbers and letters (Each digit will be considered a character). He is
not allowed to have repeated characters, but lower case letters and
upper-case letters are allowed (ex. “a” and “A” will be considered
different characters).
a. How many different passwords can he create if “a” and “A” must
be a part of the password. 


b. How many different passwords can he create if there must be
at least 8 digits in the password?

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