|
本系列为同学们整理了GRE数学中出现的一些高频高质量的题目，并配有解析，希望同学们认真备考，都能取得好成绩 1.Each employee of a certain company is in either Department X orDepartment Y, and there are more than twice as many employees inDepartment X as in Department Y. The average salary is $25,000 for the employees in Department X and is $35,000 for theemployees in Department Y.Which of the following amounts could bethe average salary for all of the employees in the company?Indicate all such amounts. A $26,000 B $28,000 C $29,000 D $30,000 E $31,000 F $32,000 G $34,000 本题我们要注意到题目中的more than twice的字眼，我们当做twice算的时候，结果是/3约等于28333，因为有more than，所以选的答案要么是比前面这个数大，要么小，又由于more的是X部门的，那么肯定会将平均工资给拉低了，因此，选比前面那个数小的答案，AB都可以了。。 2.Working alone at its constant rate, machine A produces k car parts in 10minutes. Working alone at its constant rate, machine B produces k car partsin 15 minutes. How many minutes does it take machines A and B, workingsimultaneously at their respective constant rates, to produce k car parts? ____________minutes | 
