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

It is currently 22 Aug 2014, 00:08

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

PS-A Large Cube-Probability

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
User avatar
Joined: 04 Jan 2008
Posts: 919
Followers: 44

Kudos [?]: 159 [0], given: 17

GMAT Tests User
PS-A Large Cube-Probability [#permalink] New post 31 Mar 2009, 22:33
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A large cube 10cm on a side is composed of smaller cubes 1 cm on a side. The large cube is printed red on its outside surfaces and then all the cubes are mixed in a drum. If one cube is selected randomly, which of the following is the approximate probability that the cube will have at least one red face?

_________________

math-polygons-87336.html
competition-for-the-best-gmat-error-log-template-86232.html

Expert Post
CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3571
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 355

Kudos [?]: 1736 [0], given: 357

GMAT ToolKit User GMAT Tests User Premium Member
Re: PS-A Large Cube-Probability [#permalink] New post 31 Mar 2009, 22:46
Expert's post
Number of 1cm3 cubes = 10*10*10 = 1000
Number of 1cm3 cubes that are not painted = 8*8*8 = 512
Probability = (1000 - 512) / 1000 ~ 1/2
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

Director
Director
avatar
Joined: 14 Aug 2007
Posts: 735
Followers: 7

Kudos [?]: 99 [0], given: 0

GMAT Tests User
Re: PS-A Large Cube-Probability [#permalink] New post 31 Mar 2009, 22:54
nitya34 wrote:
A large cube 10cm on a side is composed of smaller cubes 1 cm on a side. The large cube is printed red on its outside surfaces and then all the cubes are mixed in a drum. If one cube is selected randomly, which of the following is the approximate probability that the cube will have at least one red face?


total number of cubes = 1000
Not painted = 8^3 = 512

At least problem :) => 1 - 512/1000 = 488/1000
Director
Director
User avatar
Joined: 04 Jan 2008
Posts: 919
Followers: 44

Kudos [?]: 159 [0], given: 17

GMAT Tests User
Re: PS-A Large Cube-Probability [#permalink] New post 01 Apr 2009, 00:30
Re: PS-A Large Cube-Probability   [#permalink] 01 Apr 2009, 00:30
    Similar topics Author Replies Last post
Similar
Topics:
PS_A man chooses an outfit mbaMission 2 14 Jun 2009, 08:01
Experts publish their posts in the topic PS-A Large Cube-Probability nitya34 3 31 Mar 2009, 22:33
the large container game mandy 5 15 Jun 2005, 01:23
Sociologist: The claim that there is a large number of chunjuwu 5 17 Mar 2005, 23:55
In a large residential building, there is a rule that no chunjuwu 2 03 Oct 2004, 17:44
Display posts from previous: Sort by

PS-A Large Cube-Probability

  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®.