22. You have to choose a password for your new email account at College. It must be 6 characters long, and you can choose letters and numbers. Note: the letters are not case sensitive, so a lower case letter is the same as an upper case letter. Does this situation involve a combination or permutation? Explain. a. b. Determine the number of passwords that are possible. с. The one restriction on password choice is that the first character must be '1' if you are in year 1 of your program, '2’ if you are in year 2 of your program, etc. If someone knows that your first digit is '1', determine the probability of them guessing your password. Leave your answer in fraction form.
22. You have to choose a password for your new email account at College. It must be 6 characters long, and you can choose letters and numbers. Note: the letters are not case sensitive, so a lower case letter is the same as an upper case letter. Does this situation involve a combination or permutation? Explain. a. b. Determine the number of passwords that are possible. с. The one restriction on password choice is that the first character must be '1' if you are in year 1 of your program, '2’ if you are in year 2 of your program, etc. If someone knows that your first digit is '1', determine the probability of them guessing your password. Leave your answer in fraction form.
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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Transcribed Image Text:22. You have to choose a password for your new email account at College. It must be 6 characters long,
and you can choose letters and numbers. Note: the letters are not case sensitive, so a lower case letter
is the same as an upper case letter.
Does this situation involve a combination or permutation? Explain.
a.
b.
Determine the number of passwords that are possible.
The one restriction on password choice is that the first character must be '1' if you are in year 1
of your program, '2' if you are in year 2 of your program, etc. If someone knows that your first
digit is '1', determine the probability of them guessing your password. Leave your answer in
с.
fraction form.
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