It is known that there are seven customers arriving per hour at a certain automobile service facility, on the average. We wish to know the probability that more than 10 customers will arrive in the...

It is known that there are seven customers arriving per hour at a certain automobile service facility, on the average. We wish to know the probability that more than 10 customers will arrive in the next hour. What is the most appropriate probability distribution to describe the random variable of interest? What is the average number of customers who will arrive in the next hour at this automobile service facility?