An important subcomponent of a medical device produced by a manufacturing line is

An important subcomponent of a medical device produced by a manufacturing line is normallydistributed with mean 70.2" and standard deviation is 1.26".
(a) What is the probability that one randomly selected unit has a length exactly 72"?

(b) What is the probability that one randomly selected unit has a length less than 72"?

(d) What is the probability that, if three units are randomly selected, none of them have
lengths exceeding 72"?

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An important subcomponent of a medical device produced by a manufacturing line is

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