
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Transcribed Image Text:nesh Antokhin - Day 52/53
E Day 52 Central Limit Theorem P
G Coal is carried from a mine is W
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3. Coal is carried from a mine is West Virginia to a power plant in New York in
hópper cars on a long train. The automatic hopper car loader is set to put 75
tons of coal into each car. The actual weights of coal loaded into teach car are
normally distributed with mean u = 75 and standard deviation o = 0.8 ton.
4 points
3.a. What is the probability that one car chosen at random will have less
than 74.5 tons of coal?
Your answer
4 poim
3.b. What is the probability that 20 cars chosen at random will have a
mean load weight of less than 74.5 tons of coal?
Your answer
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