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 with a rate of 48 trucks per day, answer the following question. What is the expected number of trucks in the system?

A) 2.25
B) 1.5
C) 2
D) 1
E) 3