4. The time required in the first step of a manufacturing process is a normally-distributed random variable with mean = 45 min and standard deviation = 4 min. The time required in the second step of the manufacturing process is also a normally-distributed random variable with mean = 24 min and standard deviation = 3 min. a) What is the probability that the time required to complete both of those steps will be greater than 75 min? b) What is the probability that the time required to complete both steps will be no more than 70 min?

4. The time required in the first step of a manufacturing process is a normally-distributed random variable with mean = 45 min and standard deviation = 4 min. The time required in the second step of the manufacturing process is also a normally-distributed random variable with mean = 24 min and standard deviation = 3 min. a) What is the probability that the time required to complete both of those steps will be greater than 75 min? b) What is the probability that the time required to complete both steps will be no more than 70 min?

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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