Mr. Hayes is about to give one of his students a piece of candy for asking a good question in class. He's going to choose the piece of candy at random out of a bag he brings to class. The following pieces of candy are in the bag: 10 apple gumballs, 9 grape gumballs, 11 apple suckers, and 7 grape suckers. What is the probability that the piece of candy Mr. Hayes chooses is apple or is a gumball? Do not round intermediate computations, and round your answer to the nearest hundredth.