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Question

An observer counts 220 veh/h at a specific highway location. Assume that the vehicle arrival at the location is Poisson distributed,the probability of having five vehicles arriving over a 38 sec time interval is

A
0.025
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B
0.065
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C
0.075
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D
0.055
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Solution

The correct option is D 0.055
P=(λt)neλtn!
λ=220veh/hr,t=38sec,n=5
P=(220×383600)5×e220×3836005×4×3×2×1=0.055

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