A rope is manufactured with breaking strength that is distributed (approx.) normal with mean 500 Ibs, and standard deviation 25 Ibs. The users of these ropes subject the rope to a load that is distributed (approx.) normal with mean 420 Ibs, and standard deviation 30 lbs. If the rope strength and load are independent random variables, find the probability that any one instance of using these ropes under these loading conditions will break.

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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A rope is manufactured with breaking strength that is distributed (approx.) normal
with mean 500 Ibs, and standard deviation 25 lbs. The users of these ropes subject
the rope to a load that is distributed (approx.) normal with mean 420 lbs, and standard
deviation 30 lbs. If the rope strength and load are independent random variables, find
the probability that any one instance of using these ropes under these loading
conditions will break.
0.0365
0.0622
0.0106
0.0052
Transcribed Image Text:A rope is manufactured with breaking strength that is distributed (approx.) normal with mean 500 Ibs, and standard deviation 25 lbs. The users of these ropes subject the rope to a load that is distributed (approx.) normal with mean 420 lbs, and standard deviation 30 lbs. If the rope strength and load are independent random variables, find the probability that any one instance of using these ropes under these loading conditions will break. 0.0365 0.0622 0.0106 0.0052
Expert Solution
Step 1

Let the random variable X denote strength of ropes and Y be the strength of loads.   

Given the following information-

μx=500μy=420σx=25σy=30

 

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