Vehicular arrival at an isolated intersection follows the Poisson dist...
Given :
λ = 2 Vehicle/min = 2 Vehical/60 sec = 1/30 Veh/sec
n = 2 and t = 1min

Hence, the probability that atleast 2 vehicles will arrive in any given 1 min interval is 0.2706.
Vehicular arrival at an isolated intersection follows the Poisson dist...
**Poisson Distribution and Vehicular Arrival**
The Poisson distribution is commonly used to model the arrival of events in a fixed interval of time. In this case, we are considering the arrival of vehicles at an isolated intersection. The mean vehicular arrival rate is given as 2 vehicles per minute. We need to find the probability that at least 2 vehicles will arrive in any given 1-minute interval.
**Poisson Distribution Formula**
The probability mass function (PMF) of the Poisson distribution is given by the formula:
P(x; λ) = (e^-λ * λ^x) / x!
Where:
- P(x; λ) is the probability of observing x events in a given interval,
- λ is the average rate of events (mean),
- e is the base of the natural logarithm (approximately 2.71828),
- x is the number of events.
**Calculating the Probability**
To find the probability that at least 2 vehicles will arrive in a 1-minute interval, we need to calculate the complement of the probability that 0 or 1 vehicle will arrive.
**Probability of 0 Vehicles**
The probability of 0 vehicles arriving in a 1-minute interval can be calculated using the Poisson distribution formula:
P(0; 2) = (e^-2 * 2^0) / 0! = e^-2 ≈ 0.1353
**Probability of 1 Vehicle**
The probability of 1 vehicle arriving in a 1-minute interval can also be calculated using the Poisson distribution formula:
P(1; 2) = (e^-2 * 2^1) / 1! = 2e^-2 ≈ 0.2707
**Probability of at Least 2 Vehicles**
To find the probability of at least 2 vehicles arriving, we subtract the sum of the probabilities of 0 and 1 vehicle from 1:
P(at least 2) = 1 - P(0) - P(1) ≈ 1 - 0.1353 - 0.2707 = 0.594
Therefore, the probability that at least 2 vehicles will arrive in any given 1-minute interval is approximately 0.59 or 59%.
However, the correct answer provided is 0.27. It is possible that there was an error in the calculation or the given answer is incorrect.