Mario plays a game that involves drawing cards to move around the board. He uses a uniform probability model to determine the probability that he will win on his next turn. There are 6 red cards, 6 yellow cards, 6 orange cards, 6 purple cards, 6 blue cards, 6 green cards, and 6 black cards. Mario needs either a purple or a green card to win on his next turn. What is P(purple or green)?

2/15

1/6

2/7

1/3