马上要考了，找不到一道PREP的题目，大家帮帮忙，谢谢。

aegean040

of the students who eat in a cafe, each student either like or dislike lima beans and each either like or dislike brussels sprouts. of these students, 2/3 dislike lima beans; and of those who dislike lima beans, 3/5 also dislike burssels sprouts. How many of the students like brussels sprouts but dislike lima beans?

1.120 students eat in the cafe

2. 40 of the students like lima beans.

选D，请大家指教。谢谢。

[此贴子已经被作者于2008-6-26 15:26:20编辑过]

喝咖啡的狼

1. 总共 120个人， 2/3 dislike lima beans => 80 人

   80 x 2/5 即可

2. 40 of the students like lima beans = > 总共 120个人 ，同1.

aegean040

哈哈，豁然开朗，谢谢。