Listen Suppose the Poisson experiment is cars arrive at the drive-up window of a restaurant during a 20-minute period. The discrete random variable, x, is the total number of cars arriving during a 20-minute period. Analysis of the restaurant's data shows that the average number of cars arriving during a 20-minute period of time is 4. What is the probability that at least one car will arrive at the drive-up window of the restaurant during a 20-minute period? Your