TS EAMCET 11-Sep-2020 Shift 2 Solved Paper

The average arrival rate, λ is 240 veh{/}h or 1/15 vehicles per second.
According to poisson distribution,
P(n)=‌

(λt)ne−λt

n!

Where, P(n)= probability of having n vehicles arrive in time t.
λ= Average vehicle flow or arrival rate in per unit time
t= duration of the time interval over which vehicles are counted
e= base of natural logarithm
For more than two vehicles,
P(n>2)=‌

e2−5

e2