GRE数学考试真题及解析(5)

　　In a data set of 10,000 numbers varying from 20 to 80, the number 62 is the 60th percentile and the number 74 is the nth percentile.

　　Quantity A：n

　　Quantity B： 70

　　A. Quantity A is greater.

　　B. Quantity B is greater.

　　C. The two quantities are equal.

　　D. The relationship cannot be determined from the information given.

　　解析

　　答案：D

　　解析：注意这个题没有说这10000个数字是均匀分布的，所以nth 和70的大小是无法比较的。