Question: An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 120

An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 120 cm and a standard deviation of 4.7 cm.

A. Find the probability that one selected subcomponent is longer than 122 cm.

Probability =

B. Find the probability that if 4 subcomponents are randomly selected, their mean length exceeds 122 cm.

Probability =

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