probability

Click Here to Download this Answer Instantly

The time between arrivals of vehicles at a particular intersection follows an exponential probability distribution with a mean of 13 seconds.
What is the probability that the arrival time between vehicles is 12 seconds or less (to 4 decimals)? What is the probability that the arrival time between vehicles is 6 seconds or less (to 4 decimals)? What is the probability of 30 or more seconds between vehicle arrivals (to 4 decimals)?