Chapter 6.7, Problem 9E

Gas Queue A gas station with four self-serve pumps has determined that 80% of all customers completely fill their gas tanks and the remaining 20% fill their tank with a fixed dollar amount’s worth of fuel. Suppose that it takes an average of 5 minutes for a complete fill-up and 3 minutes for a partial fill-up. Suppose also that, from 5 p.m. until 6 p.m., customers arrive steadily so that there is always a line and that the next customer in line proceeds to the next available pump. Simulate this process for 30 customers.