Maggie has 7 tiles with pictures of plants and 2 tiles with pictures of animals. maggie keeps all the tiles on a mat with the pictures hidden and mixes them up. she then turns one tile face up and finds the picture of a plant on it. she removes this tile from the mat and turns over another tile without looking. what is the probability that the second tile that maggie turns over has a plant on it?
a) 22.2%
b) 28.6%
c) 65.0%
d) 75.0%