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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:On average, computers suffer damage after 31000 hours of
continuous use. Although the time for the computer to crash is
random, researchers have found that the duration until the computer
crashes follows an exponential probability distribution.
a. What is the probability that the computer will fail with a usage time
of less than 31000 hours?
b. What is the probability that the computer will fail with a usage time
of more than 31000 hours?
c. What is the probability that no computer will fail after more than
31000 hours of use?
d. What do you think about the results of points b and c above! What
is the difference
e. What is the probability of a computer crash with a duration of use
between 31000 and 50000 hours?
f. What is the mean and standard deviation of the duration of the
computer crash?
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