1.) According to one study, the amount of time a customer spends shopping in a grocery store is normally distributed with a mean of 45 minutes and a standard deviation of 12 minutes. Let X be the number of minutes that a customer spends shopping in a grocery store on one visit. Calculate P(30 < x < 50). 2.) According to one study, the amount of time a customer spends shopping in a grocery store is normally distributed with a mean of 45 minutes and a standard deviation of 12 minutes. Let X be the number of minutes that a customer spends shopping in a grocery store on one visit. Calculate the probability that a customer spends at least 50 minutes shopping