4 10 points eBook Ask Print References Problem 7-19 (Static) A cafeteria serving line has a coffee urn from which customers serve themselves. Arrivals at the urn follow a Poisson distribution at the rate of three per minute. In serving themselves, customers take about 15 seconds, exponentially distributed. a. How many customers would you expect to see, on average, at the coffee urn? Average no of customers b. How long would you expect it to take to get a cup of coffee? Expected time minute(s) c. What percentage of time is the urn being used? Percentage of time %

A cafeteria serving line has a colfee urn from which customers serve themselves. Artivais at the um follow o ph sson distribution of the rate of three per minute. In serving themselves, customers take about 15 seconds, exponentially distributed. o. How many customers would you expect to see. on avorage. at the colfee urn? b. How long would you expectit to take to get a cup of coffee? c. What percentage of time is the um being used