Lifetime of a lamp in an overhead projector installed at QU is normally distributed with mean of 8000 hours and standard deviation of 50O. (a) at What is the probability that an overhead projector fails after 8750 hours? (b) What is the lifetime in hours that 90% of projectors will exceed?
Lifetime of a lamp in an overhead projector installed at QU is normally distributed with mean of 8000 hours and standard deviation of 50O. (a) at What is the probability that an overhead projector fails after 8750 hours? (b) What is the lifetime in hours that 90% of projectors will exceed?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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![Lifetime of a lamp in an overhead projector installed at QU is normally distributed with mean of 8000 hours
and standard deviation of 50O.
(a)
at
What is the probability that an overhead projector fails after 8750 hours?
(b)
What is the lifetime in hours that 90% of projectors will exceed?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F67a8b282-1ddd-4772-afef-fd1668005a22%2F849e8088-d2b8-4eaf-9f41-d882d8691c0f%2F6ig3x7e_processed.png&w=3840&q=75)
Transcribed Image Text:Lifetime of a lamp in an overhead projector installed at QU is normally distributed with mean of 8000 hours
and standard deviation of 50O.
(a)
at
What is the probability that an overhead projector fails after 8750 hours?
(b)
What is the lifetime in hours that 90% of projectors will exceed?
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