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

It is currently 05 Aug 2015, 02:59
GMAT Club Tests

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Average prices of laptops sold

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 29 Sep 2009
Posts: 16
Followers: 0

Kudos [?]: 8 [0], given: 3

Average prices of laptops sold [#permalink] New post 02 Oct 2009, 05:35
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

100% (04:14) correct 0% (00:00) wrong based on 1 sessions
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Q14/ If 60% laptops A were sold at prices between $200 and $250, 30% laptops B were sold at prices between $450 and $500, 5% laptops C were sold at prices between $3,000 and $3,100. Which of the following could be the average (arithmetic mean) of the prices of all laptops sold?

A/ $240
B/ $320
C/ $410
D/ $440
E/ $510
Manager
Manager
avatar
Joined: 30 Sep 2009
Posts: 146
Followers: 1

Kudos [?]: 22 [0], given: 0

Re: Average prices of laptops sold [#permalink] New post 02 Oct 2009, 07:38
The answer is D but I only got there through trial and error.

I found the max first, to eliminate choice E. Then I found the min. That got rid of A and B.

So I had C and D. I just adjusted one of the values to a min from a max and it came out to 440:

60 computers at 250, 30 computers at 450, and 5 computers at 3100 = an average of 440.

I'd love to see the "correct" way though!
_________________

School:
Boston College MBA '12

Re: Average prices of laptops sold   [#permalink] 02 Oct 2009, 07:38
Display posts from previous: Sort by

Average prices of laptops sold

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.