Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Amys grade was the 90 percentile of the 80 grades for her [#permalink]
30 Jan 2008, 11:23

1

This post received KUDOS

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct
0% (00:00) wrong based on 0 sessions

Amy´s grade was the 90 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?

Re: PS: Percentile [#permalink]
30 Jan 2008, 11:29

Quote:

Amy´s grade was the 90 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) 72 B) 80 C) 81 D) 85 E) 92

D

If Amy was 90th percentile out of 80, there were 72 scores below hers. If Amy had 19 scores above hers in another class, 81 were below hers.

Re: PS: Percentile [#permalink]
30 Jan 2008, 11:33

netcaesar wrote:

Amy´s grade was the 90 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) 72 B) 80 C) 81 D) 85 E) 92

D - 85%.

number of grades not exceeding Amy's (72+(100-19)) total number of students 80+100 percentile: (72+81)/180=153/180 = 85%

Re: PS: Percentile [#permalink]
30 Jan 2008, 13:55

netcaesar wrote:

Amy´s grade was the 90 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) 72 B) 80 C) 81 D) 85 E) 92

She is 72/80 in the first and 80/100 in the second.

Thus there are 27 people ahead of Amy. 180-27=153 ---> 153/180~85%

Re: PS: Percentile [#permalink]
30 Jan 2008, 19:14

maratikus wrote:

netcaesar wrote:

Amy´s grade was the 90 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) 72 B) 80 C) 81 D) 85 E) 92

D - 85%.

number of grades not exceeding Amy's (72+(100-19)) total number of students 80+100 percentile: (72+81)/180=153/180 = 85%

Hi everybody,

I am very confused with this problem. The question is about "Amy's grade was what percentile of the grades of the two classes combined?", but guys all of you go to find the grades of not exceeding Amy's, and then credit it with what question asked. I this is my weakness. Can anybody help me to make clear it? Thank you! _________________

Re: PS: Percentile [#permalink]
31 Jan 2008, 10:06

Quote:

Hi everybody,

I am very confused with this problem. The question is about "Amy's grade was what percentile of the grades of the two classes combined?", but guys all of you go to find the grades of not exceeding Amy's, and then credit it with what question asked. I this is my weakness. Can anybody help me to make clear it? Thank you!

The key to this question is to understand what is being asked. The question is asking where Amy's grade ranks in comparison to the two classes combined (class A: 80 kids, and class B: 100 kids). The stem gives you her ranking individually but you need to calculate her ranking overall. It's similar to a weighted average question.

Does that help?

gmatclubot

Re: PS: Percentile
[#permalink]
31 Jan 2008, 10:06

Type of Visa: You will be applying for a Non-Immigrant F-1 (Student) US Visa. Applying for a Visa: Create an account on: https://cgifederal.secure.force.com/?language=Englishcountry=India Complete...