GMAT综合推理题 放平心态应对复杂函数
- 2015年07月17日15:17 来源：小站整理
- 参与（1） 阅读（5428）
GMAT备考，除了背背背，更重要的就是练练练！通过练习，巩固知识，熟练技巧，最终才能在GMAT考试中发挥出色，取得好成绩，所以练习的重要性不言而喻。因此，小编为大家精心准备了GMAT考试各类题型的练习题和答案解析，帮助大家每日一练，为考试做好准备。一起来看今天的题目吧。
今日练习题为综合推理题，题目如下
Over a period of 5 academic years from Fall 1999 through Spring 2004, the number of faculty at a certain college increased despite a decrease in student enrollment from 5,500 students in Fall 1999.
In the given expressions, F and S represent the percent change in the number of faculty and students, respectively, over the 5 academic years,
and R represents the number of students per faculty member in Fall 1999. The percent change in a quantity X is calculated using the formula
Select the expression that represents the number of faculty in Fall 1999, and select the expression that represents the number of students per faculty member in Spring 2004. Make only two selections, one in each column.
1. Students per faculty member in Spring 2004
A. 5500R B. 5500/R C. 1/R D. (100+S)/(100+F)*R E. (100-S)/(100+F)*R F. (100+F)/(100-S)*R
2. Number of faculty in Fall 1999
A. 5500R B. 5500/R C. 1/R D. (100+S)/(100+F)*R E. (100-S)/(100+F)*R F. (100+F)/(100-S)*R
正确答案：
B D
解题思路：
1. 1999年有5500个学生，R是1999年的平均每个系的学生，故R=5500/系数量，即系数量=5500/R
2. 从定义上，R=学生数/系数量，故2004年的新R/1999年的R=(1+S%)/(1+F%)，移项得到新的R=(100+S)/(100+F)*R
