In an unloading dock, truck arrives every 10 minutes (on average), the dock worker can unload a truck in 6 minutes (on average). What is the average waiting length (number of trucks)?
1.2 trucks
1.0 trucks
0.9 trucks
0.6 trucks
0 truck
none of above
Expert Answer
Truck arrives every 10 minutes. So in 10 minutes 1 truck arrives. So in 1hour or 60 minutes (60/10) = 6 trucks will arrive. So the arrival rate(lambda) = 6 per hour
The duck worker can unload a truck in 6 minutes. So in 6 minutes 1 truck is unloaded. So in 1hour or 60 minutes (60/6)=10 trucks will
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