# Math Help - poisson distribution.

1. ## poisson distribution.

The number of customers entering the store every 15 minutes follow a Poisson distribution with the parameter λ=2. Calculate the probability that 6 or more customers visit the store within an hour.

2. Originally Posted by Suchy
The number of customers entering the store every 15 minutes follow a Poisson distribution with the parameter λ=2. Calculate the probability that 6 or more customers visit the store within an hour.
X ~ Poisson $(\lambda = (2)(4) = 8)$.
Calculate $\Pr(X \geq 6) = 1 - \Pr(X \leq 5)$.