Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 20 May 2013, 07:32
Customize  |  Hide

Search
Register
New posts
Unanswered

What is the probability of getting at least one six in a

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
VP
VP
User avatar
Joined: 13 Jun 2004
Posts: 1135
Location: London, UK
Schools: Tuck'08
Followers: 5

Kudos [?]: 14 [0], given: 0

GMAT Tests User
What is the probability of getting at least one six in a [#permalink] New post 13 Mar 2005, 19:10
What is the probability of getting at least one six in a single throw of three unbiased dice?

(a) 1 / 6
(b) 125 / 216
(c) 1 / 36
(d) 91 / 216
(e) 11 / 38
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5134
Location: Singapore
Followers: 9

Kudos [?]: 87 [0], given: 0

GMAT Tests User
 [#permalink] New post 13 Mar 2005, 20:34
P(getting a 6) = 1/6
P(not getting a 6 on one throw) = 5/6
P (not getting a 6 on three throws) = 5/6*5/6*5/6 = 125/216

P(getting at least a 6) = 1-125/216= 91/216 <--- (D)
SVP
SVP
Joined: 18 Nov 2004
Posts: 1544
Followers: 2

Kudos [?]: 9 [0], given: 0

GMAT Tests User
 [#permalink] New post 13 Mar 2005, 20:44
One 6 = 3*25/6^3
Two 6 = 3*5/6^3
Three 6 = 1/6^3

p(e) = 91/6^3
Director
Director
User avatar
Joined: 21 Sep 2004
Posts: 738
Followers: 1

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

GMAT Tests User
 [#permalink] New post 14 Mar 2005, 15:01
atleast.. again the way i would go is "think minus 1"

P(not getting any 6 three times would be 125/216

1-125/216= 91/216
VP
VP
User avatar
Joined: 13 Jun 2004
Posts: 1135
Location: London, UK
Schools: Tuck'08
Followers: 5

Kudos [?]: 14 [0], given: 0

GMAT Tests User
 [#permalink] New post 14 Mar 2005, 17:29
:-D OA is 91/216
  [#permalink] 14 Mar 2005, 17:29
    Similar topics Author Replies Last post
Similar
Topics:
 New posts What is the probability of getting at least one 11 in 3 araspai 4 09 Oct 2003, 21:50
New posts What is the probability of getting a six on either the first hidalgo01 6 29 Sep 2007, 03:37
New posts 1 EXPERTS_POSTS_IN_THIS_TOPIC What is the Probability of getting exactly 2 sixes on three Professor5180 2 20 Jan 2012, 16:02
New posts 2 EXPERTS_POSTS_IN_THIS_TOPIC What is the probability of getting at least 2 heads in a row rovshan85 4 15 Apr 2012, 22:03
New posts 4 Probability of at least one outcome rooker 4 04 Apr 2013, 08:09
Display posts from previous: Sort by

What is the probability of getting at least one six in a

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com