Assuming a 24 Hour Operation in a Warehouse, and an Arrival

Multiple Choice

Assuming a 24 hour operation in a warehouse, and an arrival following Poisson distribution with mean rate of 36 per day and service (unloading using a single bay) following exponential distribution with a rate of 48 trucks per day, answer the following question. What is the expected waiting time in the system (in hours) for a typical truck?

A) 2 hours
B) 1 hour
C) 1.5 hour
D) 0.25 hour
E) 0.5 hour