The city carnival is holding a raffle. Every raffle ticket purchased will go into a large bin. At the end of the day, one ticket will be drawn at random for the grand prize. Lewis bought 3 tickets, Raul bought 5 tickets, and Amy bought 10 tickets. If a total of 400 tickets were sold, what is the probability that either Raul or Amy will win the grand prize? A. B. C. D.