Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 22 May 2015, 20:39

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Each of the students in a class either has 3 pencils and 1

Author Message
TAGS:
Senior Manager
Joined: 08 Aug 2005
Posts: 251
Followers: 1

Kudos [?]: 18 [0], given: 0

Each of the students in a class either has 3 pencils and 1 [#permalink]  27 Apr 2006, 22:49
Each of the students in a class either has 3 pencils and 1 pen or has 1 pencil and 2 pens. The average of pencils in total class is 1.6, what is the average of pen?
Manager
Joined: 20 Mar 2005
Posts: 201
Location: Colombia, South America
Followers: 1

Kudos [?]: 6 [0], given: 0

Re: Average of pen and pencil [#permalink]  28 Apr 2006, 00:12
getzgetzu wrote:
Each of the students in a class either has 3 pencils and 1 pen or has 1 pencil and 2 pens. The average of pencils in total class is 1.6, what is the average of pen?

I get:

x=students in a class that have 3 pencils and 1 pen
y=students in a class that have 1 pencil and 2 pen

3x + y = 1.6(x+y)

so 1.4x = 0.6y
7x=3y

so we could have x=3
y=7

and then solve for x+2y = z(x+y)
3+14 = z(10)

so z= 1.7

so average of pen 1.7
VP
Joined: 06 Jun 2004
Posts: 1059
Location: CA
Followers: 2

Kudos [?]: 49 [0], given: 0

Concur with conocieur's working.
_________________

Don't be afraid to take a flying leap of faith.. If you risk nothing, than you gain nothing...

Similar topics Replies Last post
Similar
Topics:
1 Each of the 30 students in a class is either male or female 2 29 Sep 2012, 23:03
6 Each of the 30 students in a class is either male or female, 6 21 Sep 2009, 17:32
Marta bought several pencils. If each pencil was either a 8 13 Jun 2007, 07:36
Martha bought several pencils. If each pencil was either a 14 20 Dec 2005, 08:01
Marta bought several pencils. If each pencil was either a 7 30 May 2005, 16:23
Display posts from previous: Sort by

# Each of the students in a class either has 3 pencils and 1

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.