The average waiting time to be seated is 23.5 minutes, with a standard deviation of 3.6 minutes. assume the variation is normally distributed. When a patron arrives at the restuarant for dinner find the probability that the person will have to wait A. between 15-22 minutes B. Less than 20 minutes C. Find probility that the mean of a randomly selected 25 patrons will be more than 25 minutes.