Average sales for an online textbook distributor were $71.75

Last updated: 7/10/2022

Average sales for an online textbook distributor were $71.75 per customer per purchase. Assume the sales are normally distributed. If the standard deviation of the amount spent on textbooks is $8.79, find these probabilities for a randomly selected customer of the online textbook distributor. The probability that a randomly selected customer spent more than $63 per purchase is