An observer counts 240 veh/h at a specific highway location. Assume that the vehicle arrival at the location is Poisson distributed, the probability of having one vehicle arriving over a 30-second time interval is ____________

An observer counts 240 veh/h at a specific highway location. Assume th

1.	An observer counts 240 veh/h at a specific highway location. Assume that the vehicle arrival at the location is Poisson distributed, the probability of having one vehicle arriving over a 30-second time interval is ____________
A.	0.27
B.	0.31
C.	0.29
D.	0.3
Answer» B. 0.31