单选题
In a certain group of people, 
of the people are men, and 
of the men have brown eyes. If 
of the people have brown eyes, then what fraction of the group are women who do not have brown eyes?
of the people are men, and of the men have brown eyes. If of the people have brown eyes, then what fraction of the group are women who do not have brown eyes?
【正确答案】
A
【答案解析】