PREP 2-113(DS)

Chowmeiner

请教

讨论帖子没有， 这种类型的题目很搞啊

In a certain year the United Nations' total expenditures were $1.6 billion.  Of this amount, 67.8 percent was paid by the 6 highest-contributing countries, and the balance was paid by the remaining 153 countries.  Was Country X among the 6 highest-contributing countries?

(1) 56 percent of the total expenditures was paid by the 4 highest-contributing countries, each of which paid more than Country X.

(2) Country X paid 4.8 percent of the total expenditures.

（E）

MerisaLees

我数学也不好，不过我们可以讨论一下；

1）67.8%-56%=11.8%, 不知道x占多少，不充分；

2）x=4.8%, 67.8%/6>11%>4.8%, 那么X即可以是6国，又可以是153国，不充分

两个条件加起来，11.8%/2=5.6%>4.8%,那么X即可以是6国，又可以是153国,不充分；

如果2）x>12%, 则应该选B

如果2）x>5.6%, 则应该选C

1.6billion这个条件好像始终没用上。

反正就是X如果不是6国，那么绝对不能大于它们的平均值。

Chowmeiner

谢谢哈

我做的时候，大致也是这样想的，但总觉得这种题目应该有系统的解法吧。