求助

64.
                        5320-!-item-!-187;#058&004563

Are at least 10 percent of the people in Country X who are 65 years old or older employed?

(1) In Country X, 11.3 percent of the population is 65 years old or older.

(2) In Country X, of the population 65 years old or older, 20 percent of the men and 10 percent of the women are employed.

 答案是Ｂ，可不可以帮忙分析一下

我认为此题考察的是平均数的概念。

the people in Country X who are 65 year old or older ：是否此类人中10％被雇佣

而（2）给出the population 65 year old or older：20 percent of the men and 10 percent of the women被雇佣；

因为在这个群体中只分为男人(x)和女人(y)，所以题目所求也就是20%x+10%y)/(x+y)=10%x/(x+y)+10%>10%

（2）陷阱题，两个条件其实是一样的

请先查询，再发贴

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