The customer coming process to a store is modeled by Poisson
distribution and this store has an average of 3 customers per hour.
Answer the following questions:
(a) (10 points) What is the probability that more than 2
customers will enter this store in 40 minutes?
(b) (10 points) What is the average time after the 4th customer
enters this store until the 6th customer entrance?(the time between
4th customers entrance and 6th customer s entrance ) (c) (10
points) What is the probability that after the 4th customer enters
this store, until the 6th customer enters it, it is less than 50
minutes?