Orange Line "L" trains from Midway airport to downtown Chicago run every 15 minutes, and the waiting times for trains are uniformly distributed. a) What is the mean waiting time for an Orange Line train? b) Find the probability that a randomly selected passenger waits more than 9 minutes. c) Find the third quartile for waiting times.

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.