GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

It is currently 05 Jul 2020, 12:09

Close

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
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.

Close

Request Expert Reply

Confirm Cancel

There are X girls in a class, and their average height is M inches.

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 64949
There are X girls in a class, and their average height is M inches.  [#permalink]

Show Tags

New post 29 Mar 2016, 01:43
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

75% (00:55) correct 25% (00:49) wrong based on 71 sessions

HideShow timer Statistics

There are X girls in a class, and their average height is M inches. In the same class, there are Y boys with an average height of N inches. What is the average height of all the students in the class?

A. (X + Y)/(M + N)

B. (M + N)/(X + Y)

C. (XM + YN)/(M + N)

D. (XM + YN)/(X + Y)

E. MN/XY

_________________
Manager
Manager
avatar
Joined: 18 Sep 2014
Posts: 219
Reviews Badge
Re: There are X girls in a class, and their average height is M inches.  [#permalink]

Show Tags

New post 29 Mar 2016, 03:25
There are X girls in a class, and their average height is M inches. In the same class, there are Y boys with an average height of N inches. What is the average height of all the students in the class?

A. (X + Y)/(M + N)

B. (M + N)/(X + Y)

C. (XM + YN)/(M + N)

D. (XM + YN)/(X + Y)

E. MN/XY

Total height = XM+YN
No of students = X+Y
Avg = (XM+YN)/(X+Y)

Answer is D
Current Student
User avatar
D
Joined: 12 Aug 2015
Posts: 2519
Schools: Boston U '20 (M)
GRE 1: Q169 V154
GMAT ToolKit User
Re: There are X girls in a class, and their average height is M inches.  [#permalink]

Show Tags

New post 30 Mar 2016, 04:24
Senior Manager
Senior Manager
User avatar
G
Status: Today a Reader; Tomorrow a Leader.
Joined: 14 Oct 2019
Posts: 406
Location: India
GPA: 4
WE: Engineering (Energy and Utilities)
Re: There are X girls in a class, and their average height is M inches.  [#permalink]

Show Tags

New post 16 Apr 2020, 09:39
There are X girls in a class, and their average height is M inches. In the same class, there are Y boys with an average height of N inches. What is the average height of all the students in the class?

sum of the girls' height = X*M =XM
sum of the boys' height = Y*N =YN
total number of boys and girls = X+Y
the average height of all the students in the class = (XM + YN)/(X + Y)

correct answer D
GMAT Club Bot
Re: There are X girls in a class, and their average height is M inches.   [#permalink] 16 Apr 2020, 09:39

There are X girls in a class, and their average height is M inches.

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne