It is currently 17 Jan 2018, 06:28

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Probability brain teaser

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 23 Oct 2017
Posts: 1

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

Probability brain teaser [#permalink]

Show Tags

New post 23 Oct 2017, 05:27
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

Hi I just thought of this probability brain teaser that I can't wrap my head around, any solution would be great.

10 balls are put in a jar, 9 red and 1 blue. The aim of the task is to take the blue ball out. 10 people take turns at removing one of the balls. Once the ball is removed it is not put back in the jar. So when the 1st person takes a ball out, there is then 9 balls left.

In which position of the order has the highest likelihood of removing the blue ball? Obviously the person going last (10th) has 100% chance of taking out the blue ball, but the chance of the blue ball being taken out by one of the previous 9 people must also be considered.

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

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 43306

Kudos [?]: 139275 [0], given: 12781

Re: Probability brain teaser [#permalink]

Show Tags

New post 25 Oct 2017, 01:31

Kudos [?]: 139275 [0], given: 12781

Re: Probability brain teaser   [#permalink] 25 Oct 2017, 01:31
Display posts from previous: Sort by

Probability brain teaser

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.