Jolt - M
The soda machines outside the lecture hall sees a steady stream of customers throughout the day. Between the student's use of the machine and the mechanism, it takes 15 seconds (exponentially distributed) to deliver a can of carbonated sugar water to a thirsty customer. Over the course of a twelve-hour lecture day, students arrive at the rate of 450 per hour.
What is the likelihood that there aren't enough customers making purchases or waiting in line to form a barbershop quartet?
• 0.33
• 0.30
• 0.25
• 0.20