Problem 15-7 (algorithmic) speedy oil provides a single-server automobile oil change and lubrication service. customers provide an arrival rate of 4 cars per hour. the service rate is 5 cars per hour. assume that arrivals follow a poisson probability distribution and that service times follow an exponential probability distribution. what is the average number of cars in the system? if required, round your answer to two decimal places

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer