选择题
2019 AMC 8 Problem 15: Sunglasses and Caps
On a beach 50 people are wearing sunglasses and 35 people are wearing caps. Some people are wearing both sunglasses and caps. If one of the people wearing a cap is selected at random, the probability that this person is also wearing sunglasses is 2/5. If instead, someone wearing sunglasses is selected at random, what is the probability that this person is also wearing a cap?
2019 AMC 8 Problem 15: Sunglasses and Caps
海滩上有 50 人戴着墨镜，35 人戴着帽子。有些人既戴着太阳镜又戴着帽子。如果随机选择一个戴帽子的人，那么这个人也戴墨镜的概率是2/5。如果随机选择一个戴着墨镜的人，这个人也戴着帽子的概率是多少
A.
14/85
B.
7/25
C.
2/5
D.
4/7
E.
7/10