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 2 tickets, Raul bought 6 tickets, and Amy bought 8 tickets.
If a total of 350 tickets were sold, what is the probability that either Raul or Amy will win the grand prize?
A. 3/175
B. 1/175
C. 4/175
D. 1/25