今天做PREP碰到一道题,在论坛上搜了半天也没有找到
On a certain sight-seeing tour, the ratio of the number of women to the number of children was 5 to 2. What was the number of men on sight-seeing tour?
1) on the sight -seeing tour, the ratio of the number of children to the no of men was 5 to 11
2)the number of women on the sight-seeing tour was less than 30.
答案是 C
可是在这题中不是不能确定具体的数字啊? 这样也可以选C 吗? | 
