求助 OG12-46 sample questions

jessiecg

46. Last than t year the average(arithmetic mean) salary of the 10 employees of Company X was $42800.What is the average salary of the same 10 employees this year?

1 For 8 of the 10 employees, this year's salary is 15percent greater than laster year's slary .
2 For 2 of the 10 employees, this year's salary is the same as last year's salary.

答案是E，我选的C， 想不明白，求大牛们指点~

jessiecg

大家帮帮忙啊~

向往

条件:
1, 10个员工中的8个, 今年比去年工资增加了15%
2, 10个员工中的另外2个(如果和1一起考虑的话), 今年工资和去年一样.
但问题的关键是, 这十个人的工资并不相同. 举两个极端的例子, 1中的8个去年工资是0, 工资全都是2中的2个的; 和2中的2个工资是0, 剩下工资全都是1中8个的. 这两个极端例子下今年都会有各自的不同的平均工资, 从而只能选择E了.

jessiecg

明白了~谢谢~