A Coffee Vending Machine Is Regulated Weekly So That The Amount Of Coffee Poured Out From The Valve Is 8.0 Oz.?
The distribution is normal with standard deviation, SD = 0.4 ounces. Suppose the cup can only holds up to 8.5 ounces.
(a) Find the probability of spilling
(b) A regular customer complains about the spilling problem whenever it occurs. He buys 1 cup of coffee every day. What is the probability of complaining more than 2 times in a week (7 days)?
(c) 400 cups were sold in a day. Find the probability that there are more than 40 spilling.