百思不得其解！求解！

Xiaotongdi

of the 60 animals on a certain farm, 2/3 are either pigs or cows. how many of the animals are cows?
1. the farm has more than twice as many cows as it has pigs.
2. the farm has more than 12 pigs.
答案是C，但是我觉得两个合起来也求不出来啊！其实这题读的都有点模糊，题目给出了40只动物是猪或者牛？

pxcsky

题目给出的2/3应该是说剩下的是别的动物了吧
大于12个猪，奶牛又是猪的两倍以上，那么奶牛和猪的总数应该是大于13*3=39只，那么就可以确定一定是13猪，27牛咯~

cthy1

我认为是这样滴。
同时满足1、2时，40个分三等份算出来是13.33333……，那么猪不可能有14个，同时猪要多于12个，只可能是13个，牛就是27个。
满足1、2的唯一的解。

瓜瓜不瓜

(1) the farm has more than twice as many cows as it has pigs.
这个选项的意思是说 牛比猪的数量的两倍还多么？
我的理解是 牛的数量比猪多两倍 也就是牛是猪的三倍
more than twice as many as 是什么意思？我可能是SC做晕菜了。。

davidpan86

我觉得2楼正确

jetfirenova

同意一楼

ALGT

已知：
P>12
C+P=40
C>2P

所以：
将第三个带入第二个
3P<40，则P<13.333
综合第一个条件，则只有P＝13