问两道prep上的题目

cancd

Amy’s grade was the 90th percentile of the 80 grades for her class. Of the 100 grades from another class, 19 were higher than Amy’s., the rest were lower. If no other grade was the same as Amy’s grade, then Amy’s grade was what percentile of the grades of the two classes combined?
A 72nd B 80th C 81st D 92nd


The total of Company C’s assets in 1994 was 300 percent greater than the total in 1993, which in turn was 400 percent greater than the total in 1992. If the total of Company C’s assts in 1992 was N dollars, which of the following represents the total of Company C’s assets, in dollar, in 1994?
7N 8N 9N 12N 20N

这两道题，我有点想不明白，不知道能否有人能帮我一下，谢谢了

yingzijuyuan1

第一题没有85%这个答案么？ 我怎么算出来是85%啊。  A在80人的班上排90%，另一个一百人的班上有19个成绩比她高，没有和他成绩相同的，问她在两个班的总排名。

第二题是20n，  题干意思是  A4-A3=300%A3，A3-A2=400%A2，知道A2求A4，  你是题目没看明白吧？  倍数表达关系要看清楚，4times as many as结构里，无论A  B位置在那里，都是前面变量是后面变量的4倍

cancd

第一道题我漏了85这个答案了，歹势 是这个答案

A 在80人的班上排90% 是指 A前面有 8个人比她成绩高吗？还是说 是72个人比他成绩高？就是这里不明白这个90% percentile是什么意思？

第二题  晕了当时直接把4+5 直接得出9N了 应该是乘法

无论如何 非常感谢你 祝你考试顺利

yingzijuyuan1

90%就是 90分位的意思，和GMAT考试的那个百分比一个意思，数字越大排名越好

cancd

哦哦 明白啦 谢谢啦 也顺便恭喜楼主 考了一个不错的成绩哈