一道数学题没看懂意思，求解

594davidvilla

On July 1 of last year,the total number of emplyees at Company E was decreased by 10percent.Without any change in the salaries
of the remaining employees,the average(arithmetic mean)empolyee salary was 10 percent more after the decrease in number of
empolyees than before the decrease.The total of the combine salaries  of all of the empolyees at Company E after July 1 last
year was what percent of that before July 1 last year
选项90% 99% 100% 101% 110%

kenny1123

99%吗?

happygirlemily

90%X110%=0.99=99%

kenny1123

7月1号前人数X，平均薪水Y
7月1号后人数9X/10，平均薪水11Y/10
后比前：9X/10*11Y/10 比 X*Y
99/100？

594davidvilla

7月1号前人数X，平均薪水Y
7月1号后人数9X/10，平均薪水11Y/10
后比前：9X/10*11Y/10 比 X*Y
99/100？

-- by 会员 kenny1123 (2012/4/4 21:54:35)

3Q，过程我懂了。 题目里：剩下人的工资不变，是说平均的还是总的？还有combine salaries 是啥意思