You arrive into a building and are about to take an elevator to the your floor. Once you call the elevator, it will take between 0 and 42 seconds to arrive to you. We will assume that the elevator arrives uniformly between 0 and 42 seconds after you press the button. If you waited for 15 seconds and the elevator still didnt arrive, what is the probability that you will have to wait for an additional 18 seconds? (Answer in 2 decimal places)
