Answer Happy

Automobiles arrive at the drive-through window at the downtown Baton Rouge, Louisiana, post office at the rate of 4 every 10 minutes. The average service time is 1.5 minutes. The Poisson distribution is appropriate for the arrival rate and service times are negative exponentially distributed.
a) The average time a car is in the system = b) The average number of cars in the system = minutes (round your response to two decimal places). cars (round your response to two decimal places). minutes (round your response to two decimal places). (round your response to two decimal places). c) The average number of cars waiting to receive service = cars (round your response to two decimal places). d) The average time a car is in the queue = e) The probability that there are no cars at the window = f) The percentage of the time the postal clerk is busy = g) The probability that there are exactly 2 cars in the system = h) If a second drive-through window, with its own server, were added, the average time a car is in the system = % (round your response to the nearest whole number). (round your response to three decimal places). minutes (round your response to two decimal places).