Question: Beate Klingenberg manages a Poughkeepsie New York movie theater complex

Beate Klingenberg manages a Poughkeepsie, New York, movie theater complex called Cinema 8. Each of the eight auditoriums plays a different film; the schedule staggers starting times to avoid the large crowds that would occur if all four movies started at the same time. The theater has a single ticket booth and a cashier who can maintain an average service rate of 280 patrons per hour. Service times are assumed to follow an exponential distribution. Arrivals on a normally active day are Poisson distributed and average 210 per hour.
To determine the efficiency of the current ticket operation, Beate wishes to examine several queue- operating characteristics.
a) Find the average number of moviegoers waiting in line to purchase a ticket.
b) What percentage of the time is the cashier busy?
c) What is the average time that a customer spends in the system?
d) What is the average time spent waiting in line to get to the ticket window?
e) What is the probability that there are more than two people in the system? More than three people? More than four?

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