Aircraft arrive at an airport according to a poisson process at a rate of 12 per hour. All aircrafts are handled by one air traffic controller. If the controller takes a 2 minute coffee break, what is...

Extracted text: Aircraft arrive at an airport according to a poisson process at a rate of 12 per hour. All aircrafts are handled by one air traffic controller. If the controller takes a 2 minute coffee break, what is the probability that he will miss one or more arriving aircrafts.