A passcode on a smartphone consists of 4 digits, and repetition of digits is allowed. a) Determine the number of possible four-digit passcodes. b) If a person finds a smartphone and randomly enters 4 digits, what is the probability that the

A passcode on a smartphone consists of 4 digits, and repetition of digits is allowed. a) Determine the number of possible four-digit passcodes. b) If a person finds a smartphone and randomly enters 4 digits, what is the probability that the

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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Question

A passcode on a smartphone consists of

digits, and repetition of digits is allowed.

a) Determine the number of possible

four-digit

passcodes.

b) If a person finds a smartphone and randomly enters

digits, what is the probability that the correct passcode is entered?

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