求解

gdbzyxr

of the 60animals on a certain farm,2/3 are either pigs or cows.How many of the animals are pigs?(1) The farm has more than twice as many cows as it has pigs.
(2) The farm has more than 12 pigs.


为什么答案是C？？求解释~~~究竟该题如何理解？farm里面是不是不单单只有PIG 和 COW？

Aviva0307

我今天刚做的的prep的模拟题，答案是E

沙龙

沙发答案错了吧

设猪X牛Y

那么X+Y=40
条件一 Y>2X 可得最小也就是37牛13猪
条件二 X>12
那么应该就是C啊