这个OG的数学题是不是答案错了，求解

许栩

这个data sufficiency 是OG上面的题目，答案是不是错了？

Last year the average salary of the 10 employees of Company X was $42,800. What is the average salary of the same 10 employees this year?
(1) For 8 of the 10 employees, this year's salary is 15 percent greater than last year's salary.
(2) For 2 of the 10 employees, this year's salary is the same as last year's salary.

答案是E，我觉得是C？求解释。

许栩

summerzhang16 发表于 2015-11-26 12:18
(1) +（2) 知道的条件也只是其中8位increase 15%, 8位的salary 没有reference,也计算不出来。 ...

哦哦哦对哦！！！刚刚脑子一下子没有转过来傻掉了哈哈，谢谢！

summerzhang16

(1) +（2) 知道的条件也只是其中8位increase 15%, 8位的salary 没有reference,也计算不出来。