一道GMAT数学题~Amy's grade was the 90th percentile of the 80 grad

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/12 14:26:21

一道GMAT数学题~
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,and 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.85th
E.92nd

在 Amy 班那 80 个分数中,90% 比她的分数低.所以有 72 个分数比她的低.在那 100 人的班里,有 81 个比 Amy 的低.（注意：是 81 而不是 80,因为 Amy 不在这个班里面.）两班合起来就有 180 个学生,其中 72 + 81 = 153 个的分数比 Amy 的低.153/180 = 85%,所以 Amy 在这 180 人当中的 percentile 是 85.

一道GMAT数学题~Amy's grade was the 90th percentile of the 80 grad G的数学题,Amy's grade was the 90th percentile of the 80 grades f 英语翻译the 99th percentile events急用 Denote by k the 100(1-α)th percentile of the standard normal 几道GMAT数学题40.the product of all positive even numbers less th frShirley was so busy" "(copy)the answer from Amy's paper th 一道Gmat数学题!For any positive integer n,the sum of the first n 一道GMAT数学题Q19:Each of the 30 boxes in a certain shipment weig 求一道GMAT数学题Of the 32 students in a certain class,15 are in a 英语翻译FourIn the early 1950s ,I was a grad student at the Univ 英语翻译In the early 1950s ,I was a grad student at the Universi Gmat DS 求解If the length of Wanda's telephone call was rounde