d. What percentage of terminals will last between 2.5 and 4.5 years? e. If the manufacturer guarantees the terminals for 3 years (and will replace them if they malfunction), what percentage of terminals will be replaced?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Plz answer d and e part only
3. The life expectancy of a laptop terminals is normally distributed with a mean of 4 years and a standard
deviation of 10 months.
What is the probability that a randomly selected terminal will last more than 5 years?
a.
b.
What percentage of terminals will last between 5 and 6 years?
What percentage of terminals will last less than 4 years?
с.
d.
What percentage of terminals will last between 2.5 and 4.5 years?
е.
If the manufacturer guarantees the terminals for 3 years (and will replace them if they malfunction), what
percentage of terminals will be replaced?
Transcribed Image Text:3. The life expectancy of a laptop terminals is normally distributed with a mean of 4 years and a standard deviation of 10 months. What is the probability that a randomly selected terminal will last more than 5 years? a. b. What percentage of terminals will last between 5 and 6 years? What percentage of terminals will last less than 4 years? с. d. What percentage of terminals will last between 2.5 and 4.5 years? е. If the manufacturer guarantees the terminals for 3 years (and will replace them if they malfunction), what percentage of terminals will be replaced?
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