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

It is currently 02 Sep 2014, 23:11

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

1) A bag contains 3 green marbles, three red marbles and 2

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
CEO
CEO
User avatar
Joined: 21 Jan 2007
Posts: 2770
Location: New York City
Followers: 6

Kudos [?]: 220 [0], given: 4

GMAT Tests User
1) A bag contains 3 green marbles, three red marbles and 2 [#permalink] New post 25 Feb 2008, 09:02
1) A bag contains 3 green marbles, three red marbles and 2 blue marbles. What is the probability of each marble on three successive selections being a different color?
A.1/336
B.1/56
C.3/56
D.9/56
E.9/28


2).What is the probability of getting 2 red marbles and 1 green marble within 3 tries of drawing marbles from the bag?
_________________

You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson

1 KUDOS received
Director
Director
avatar
Joined: 01 Jan 2008
Posts: 629
Followers: 3

Kudos [?]: 130 [1] , given: 1

GMAT Tests User
Re: successive selections [#permalink] New post 25 Feb 2008, 09:18
1
This post received
KUDOS
bmwhype2 wrote:
1) A bag contains 3 green marbles, three red marbles and 2 blue marbles. What is the probability of each marble on three successive selections being a different color?
A.1/336
B.1/56
C.3/56
D.9/56
E.9/28


2).What is the probability of getting 2 red marbles and 1 green marble within 3 tries of drawing marbles from the bag?


1: 3C1*3C1*2C1/8C3 = 3*3*2/(8*7) = 18/56 = 9/28 -> E
2: 3C2*3C1/8C3 = 3*3/56 = 9/56 -> D
CEO
CEO
User avatar
Joined: 21 Jan 2007
Posts: 2770
Location: New York City
Followers: 6

Kudos [?]: 220 [0], given: 4

GMAT Tests User
Re: successive selections [#permalink] New post 25 Feb 2008, 09:34
thanks. just wanted to confirm my answer since i dont have the OAs.
_________________

You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson

CEO
CEO
User avatar
Joined: 29 Mar 2007
Posts: 2593
Followers: 16

Kudos [?]: 187 [0], given: 0

GMAT Tests User
Re: successive selections [#permalink] New post 25 Feb 2008, 18:55
bmwhype2 wrote:
1) A bag contains 3 green marbles, three red marbles and 2 blue marbles. What is the probability of each marble on three successive selections being a different color?
A.1/336
B.1/56
C.3/56
D.9/56
E.9/28


2).What is the probability of getting 2 red marbles and 1 green marble within 3 tries of drawing marbles from the bag?



1: (3!)*3/8*2/7*3/6 --> 9/28

2: 3C1*3/8*2/7*3/6 --> 9/56
Re: successive selections   [#permalink] 25 Feb 2008, 18:55
    Similar topics Author Replies Last post
Similar
Topics:
2 A box contains three red marbles and 1 green marble. If the avohden 2 10 Oct 2013, 13:49
Experts publish their posts in the topic John must select a marble from a bag containing red,green tejal777 3 25 Jul 2009, 02:51
There are 5 red marbles, 3 blue marbles, and 2 green bmwhype2 2 25 Feb 2008, 08:00
36 Experts publish their posts in the topic A bag of 10 marbles contains 3 red marbles and 7 blue bmwhype2 28 06 Dec 2007, 14:24
A bag contains 10 marbles - 3 red, 2 green and 5 blue sumitsarkar82 7 27 Jul 2006, 00:25
Display posts from previous: Sort by

1) A bag contains 3 green marbles, three red marbles and 2

  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®.