A social media website requires its users to create passwords that consist of four alphanumeric symbols (i.e. letters a-z or numerals 0-9) (a)What is the probability that a password will consist of the same symbol repeated four times? (b)What is the probability that there will be at least one repeated symbol in a password?

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Description: A social media website requires its users to create passwords that consist of four alphanumeric symbols (i.e. letters a-z or numerals 0-9) (a)What is the probability that a password will consist of the same symbol repeated four times? (b)What is the

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A social media website requires its users to create passwords that consist of four alphanumeric symbols (i.e. letters a-z or numerals 0-9)

(a)	What is the probability that a password will consist of the same symbol repeated four times?

(b)	What is the probability that there will be at least one repeated symbol in a password?

Expert Solution

Step 1

It is given that a password can contain 4 alphanumeric symbols (26 letters or 10 numeric).

Hence, to create a password the total number of available alphanumeric (N) is:

N=36 (26 letters +10 numeric)

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