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

It is currently 31 Aug 2015, 16:04
GMAT Club Tests

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

In Rwanda, the chance for rain on any given day is 50%. What

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 30 Mar 2006
Posts: 27
Location: New Jersey
Followers: 0

Kudos [?]: 2 [0], given: 0

In Rwanda, the chance for rain on any given day is 50%. What [#permalink] New post 10 Jul 2006, 17:01
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

23. In Rwanda, the chance for rain on any given day is 50%. What is the probability that it rains on 4 out of 7 consecutive days in Rwanda?

a) 4/7
b) 3/7
c) 35/128
d) 4/28
e) 28/135

the answer is C ???
_________________

Andre Crompton
andre.crompton@cit.com

CEO
CEO
User avatar
Joined: 20 Nov 2005
Posts: 2910
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 19

Kudos [?]: 147 [0], given: 0

 [#permalink] New post 10 Jul 2006, 18:34
Answer is

[7!/(4!*3!)] * (1/2)^4 * )1/2)^3 = 35/128

For explanation see in the end of this post.

http://www.gmatclub.com/phpbb/viewtopic.php?t=31621
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

  [#permalink] 10 Jul 2006, 18:34
Display posts from previous: Sort by

In Rwanda, the chance for rain on any given day is 50%. What

  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®.