- What is the probability that a product attains a good review? - If a new design attains good review, what is the probability that it will be a highly successful product? - If a product does not attain a good review, what is the probability that it will be a highly successful product?
- What is the probability that a product attains a good review? - If a new design attains good review, what is the probability that it will be a highly successful product? - If a product does not attain a good review, what is the probability that it will be a highly successful product?
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:Q1- Customers are used to evaluate preliminary product design. In the past, 95% of highly
successful products received good reviews, 60% of moderately successful products received
good reviews, and 10% of poor products received good reviews. In addition, 45% of products
have been highly successful, 30% have been moderately successful, and 25% have been poor
products.
a- What is the probability that a product attains a good review?
b-
If a new design attains good review, what is the probability that it will be a highly
successful product?
c-
If a product does not attain a good review, what is the probability that it will be a highly
successful product?
Q2- Messages arrive to a computer server according to a Poisson distribution with a mean rate
of 5
per hour.
a- Determine the probability that at least three messages arrive during 2 hours.
b- Determine the probability that exactly two messages arrive in one hour.
c-
Determine the length of an interval of time such that the probability that no message
arrive during this interval is 0.9.
Q3- The dimeter of the dot produced by a printer is normally distributed with a mean dimeter of
0.004 cm and standard deviation of 0.001 cm.
a- What is the probability that the diameter of a dot exceeds 0.0062 cm?
b- What is the probability that the diameter is between 0.0031 and 0.0064?
What standard dev tion of dimeters is needed so
C-
the probability in part(a) is 0.95?
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