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

It is currently 21 Aug 2014, 00:25

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

There are 3 green; 4 yellow; and 5 blue balls in a sack. 6

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 12 Jun 2006
Posts: 539
Followers: 1

Kudos [?]: 11 [0], given: 1

GMAT Tests User
There are 3 green; 4 yellow; and 5 blue balls in a sack. 6 [#permalink] New post 06 Feb 2007, 22:35
There are 3 green; 4 yellow; and 5 blue balls in a sack. 6 balls are taken at random w/o replacement. Find the prob to have 1 green; 2 yellow; and 3 blue balls.
Director
Director
User avatar
Joined: 05 Feb 2006
Posts: 904
Followers: 1

Kudos [?]: 33 [0], given: 0

GMAT Tests User
 [#permalink] New post 07 Feb 2007, 00:15
God this is time consuming question... :)
Manager
Manager
avatar
Joined: 10 Dec 2005
Posts: 112
Followers: 1

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

Re: Prob prob II [#permalink] New post 07 Feb 2007, 14:45
ggarr wrote:
There are 3 green; 4 yellow; and 5 blue balls in a sack. 6 balls are taken at random w/o replacement. Find the prob to have 1 green; 2 yellow; and 3 blue balls.


The answer would be I think

3 * 6 * 10/12 * 11 * 9

5/33
_________________

"Live as if you were to die tomorrow. Learn as if you were to live forever." - Mahatma Gandhi

Senior Manager
Senior Manager
User avatar
Joined: 04 Jan 2006
Posts: 280
Followers: 1

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

GMAT Tests User
Re: Prob prob II [#permalink] New post 07 Feb 2007, 16:07
ggarr wrote:
There are 3 green; 4 yellow; and 5 blue balls in a sack. 6 balls are taken at random w/o replacement. Find the prob to have 1 green; 2 yellow; and 3 blue balls.


Let A = Having 1 green, 2 yellow, and 3 blue balls

Prob(A) = (Total ways to pick 1 Green, 2 Yellow, and 3 Blue)/(Total ways to pick 6 balls randomly)

Total ways to pick 6 balls randomly = 12C6
Total ways to pick 1 G, 2 Y, and 3B = (3C1) x (4C2) x (5C3)

Prob(A) = ((3C1) x (4C2) x (5C3))/12C6
= (3) x (2x3)x (5x2)/ (11 x 2 x 3 x 2 x 7)
= (3 x 5)/(11 x 7) = 15/77

15/77 is the answer for me.
Re: Prob prob II   [#permalink] 07 Feb 2007, 16:07
    Similar topics Author Replies Last post
Similar
Topics:
5 Experts publish their posts in the topic A bag has 4 blue, 3 yellow and 2 green balls. The balls of voodoochild 6 30 Sep 2012, 08:13
There are 50 balls. 20 are red, 20 are green, 6 are blue, 4 bkk145 6 30 Aug 2007, 17:24
A black sack contains three green balls, five yellow balls, Swagatalakshmi 11 28 Dec 2006, 14:45
There 4 balls - yellow, red, blue, and green. You pick two gamjatang 3 24 Nov 2005, 04:43
There are 2 green, 3 red, and 2 blue balls in a box. 4 are Jacques 2 12 May 2005, 03:43
Display posts from previous: Sort by

There are 3 green; 4 yellow; and 5 blue balls in a sack. 6

  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®.