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

It is currently 23 Nov 2014, 02:55

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

A certain jar contains only "b" black marbles, "w" white

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 17 Oct 2005
Posts: 940
Followers: 1

Kudos [?]: 41 [0], given: 0

A certain jar contains only "b" black marbles, "w" white [#permalink] New post 25 Apr 2006, 21:55
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 certain jar contains only "b" black marbles, "w" white marbles, and "r" red marbles. If one marble is to be chosen at random from the jar, is the porobability that the marble chosen will be red greater than the probability that the marble chosen will be white?

1). r/(b+w) > w/(b+r)

2). b-w>r

sorry if this has been asked a million times
Director
Director
avatar
Joined: 24 Oct 2005
Posts: 576
Location: NYC
Followers: 1

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

 [#permalink] New post 25 Apr 2006, 22:51
A??

All B says is b > r+w.. ..

we need to know the relationship between r and w.. if r> w... or r< w.. we should be able to find the answer..
_________________

Success is my only option, failure is not -- Eminem

Director
Director
avatar
Joined: 17 Oct 2005
Posts: 940
Followers: 1

Kudos [?]: 41 [0], given: 0

 [#permalink] New post 25 Apr 2006, 23:02
oa is a, can you elaborate bewakoof?
Intern
Intern
avatar
Joined: 23 Feb 2006
Posts: 40
Followers: 0

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

 [#permalink] New post 27 Apr 2006, 06:08
joemama142000 wrote:
oa is a, can you elaborate bewakoof?

It A here is the explanation:
We have:
R/(B+W)>W/(B+R) let say TOTAL(T)=R+B+W now we have:
R/(T-R)>W/(T-W) => RT-RW>WT-WR =>R>W thus R/T>R/W thus P(R)>P(W).
Intern
Intern
avatar
Joined: 12 Mar 2006
Posts: 26
Followers: 0

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

 [#permalink] New post 27 Apr 2006, 07:53
I voted A too, but I kinda guessed.. :oops:

"bewaqoof" hahaha nice nick. I bet you are anything but that.
Manager
Manager
avatar
Joined: 27 Mar 2006
Posts: 136
Followers: 1

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

Re: gmatprep DS [#permalink] New post 27 Apr 2006, 09:42
joemama142000 wrote:
A certain jar contains only "b" black marbles, "w" white marbles, and "r" red marbles. If one marble is to be chosen at random from the jar, is the porobability that the marble chosen will be red greater than the probability that the marble chosen will be white?

1). r/(b+w) > w/(b+r)

2). b-w>r

sorry if this has been asked a million times


I get A as well :wink:
Re: gmatprep DS   [#permalink] 27 Apr 2006, 09:42
    Similar topics Author Replies Last post
Similar
Topics:
15 Experts publish their posts in the topic A certain jar contains only b black marbles, w white marbles anilnandyala 9 16 Nov 2010, 05:43
1 A certain jar contains only b black marbles, w white young_gun 5 30 Mar 2008, 10:43
3 Experts publish their posts in the topic A certain jar contains only b black marbles, w white marbles jimjohn 12 26 Dec 2007, 19:07
A certain jar contains only w white marbles b black marbles tlntd42 4 29 Jul 2007, 23:21
A certain jar contains only b black marbles, w white marbles nitinneha 6 04 Apr 2007, 15:47
Display posts from previous: Sort by

A certain jar contains only "b" black marbles, "w" white

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

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®.