GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 18 Jun 2019, 18:08

### GMAT Club Daily Prep

#### 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

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

# Statistic Problem:Suppose the 47 students in my 9:00 Math 80 class

Author Message
Intern
Joined: 06 Sep 2018
Posts: 1
Statistic Problem:Suppose the 47 students in my 9:00 Math 80 class  [#permalink]

### Show Tags

06 Sep 2018, 14:59
00:00

Difficulty:

(N/A)

Question Stats:

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

### HideShow timer Statistics

Suppose the 47 students in my 9:00 Math 80 class earned a mean score of 80% on Exam 1 while my 10:00 class earned a mean of 76% . If the mean score for the two classes combined is 78.35% how many students are in my 10:00 class?

Intern
Joined: 29 Aug 2018
Posts: 22
Re: Statistic Problem:Suppose the 47 students in my 9:00 Math 80 class  [#permalink]

### Show Tags

06 Sep 2018, 19:30
Use allegation:
Class 9 10
80% 76%
78.35%
2.35 1.65
Taking the ratio will give 47/33
So 33 students in class 10.
Re: Statistic Problem:Suppose the 47 students in my 9:00 Math 80 class   [#permalink] 06 Sep 2018, 19:30
Display posts from previous: Sort by