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OpenStudy (anonymous):
average sale for an online textbook distributor were 69.99 per customer per purchase. assume the sales are normally distributed if the standard deviation of the amount spent on textbooks is 9.11 find these probabilities for a randomly selected customer of the the textbook distributor.
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OpenStudy (anonymous):
he or she spent more than 62 per purchase
OpenStudy (anonymous):
PLEASE HELP ME!!!
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