帮忙看看PREP 一道题

1. On a certain sightseeing tour, the ratio of the number of women to the number of children is 5 to 2, what was the number of man on the tour?

   A. On a certain sightseeing tour, the ratio of the number of children to the number of man is 5 to 11

   B. the  number of women on  the certain sightseeing tour is less than 30.

   我选的E,因为无法判断women到底有多少人，可是正确答案是C,想问问各位B那个选项的意思是women小于30人吗，如果是小于的话，这到底怎样选的C呢？

呵呵，LZ没有考虑到最小公倍数的制约；

W:C=5:2 & C:M=5:11 =>W:C:M=25:10:22；因为W不能超过30，因此M只能是22。

多谢大侠指点！