GRE 数学经典真题问题 求解答 谢谢

qinwb9211

In a certain group of people, of the people are men and of the people have brown eyes.

Question A

Fraction of people in the group who are men who do not have brown eyes

Question B

• 
  
  
  

• AQuantity A is greater.
• BQuantity B is greater.
• CThe two quantities are equal.
• DThe relationship cannot be determined from the information given.
  

答案是D  

个人认为 答案选择A
比如 40个人
那么 30的男的
20个是棕色眼睛
当20个都是男的 的时候 (30-20)/30
当10个是女的 10个是男的 那么 20/30
无论如何 都是 大于1/4的  是不是我的想法 不对 还是哪里没思考到的呢  求大神回答下

普渡哥

图看不到阿

岁月如风1990

应该是除以40就对了 然后然后分别为1/4 或1/2