2. The number of coffees sold by the Coffee Truck seems to be normally distributed with a mean of 100 and a standard deviation of 25. (A continuity correction is not required to answer this question)

a. What is the probability that there are more than 125 sales?

b. What is the probability that there are less than 70 sales?

c. How many paper cups would the Coffee Truck need to have on hand at the market so that it

had only a 5% likelihood of running out of cups?