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

It is currently 22 Jul 2014, 06:22

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 the United States, 43% of people wear a seat belt while

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 05 Jan 2008
Posts: 709
Followers: 2

Kudos [?]: 85 [0], given: 0

GMAT Tests User
In the United States, 43% of people wear a seat belt while [#permalink] New post 28 Jun 2008, 00:12
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

50% (01:04) correct 50% (01:07) wrong based on 2 sessions
In the United States, 43% of people wear a seat belt while driving. If two people are chosen at random, what is the probability that both of them wear a seat belt?
_________________

Persistence+Patience+Persistence+Patience=G...O...A...L

Director
Director
avatar
Joined: 13 Nov 2003
Posts: 801
Location: BULGARIA
Followers: 1

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

GMAT Tests User
Re: PS: Probability-2 [#permalink] New post 28 Jun 2008, 01:17
Hi
Think we should use binominal formula. Think the ans is (43/100)^2
Director
Director
avatar
Joined: 01 Jan 2008
Posts: 629
Followers: 3

Kudos [?]: 127 [0], given: 1

GMAT Tests User
Re: PS: Probability-2 [#permalink] New post 28 Jun 2008, 10:19
scthakur wrote:
Why not (43/100)*(42/99)?


that would've work if the population of the US consisted of 100 people. The assumption here is that the population is large enough and taking one person out will not change probabilities (independence of events).
SVP
SVP
avatar
Joined: 17 Jun 2008
Posts: 1580
Followers: 11

Kudos [?]: 174 [0], given: 0

GMAT Tests User
Re: PS: Probability-2 [#permalink] New post 28 Jun 2008, 10:24
Thanks maratikus for clarification.
Re: PS: Probability-2   [#permalink] 28 Jun 2008, 10:24
    Similar topics Author Replies Last post
Similar
Topics:
Surveys_Front-seat belt IrinaOK 11 01 Sep 2007, 16:41
It is not correct that the people of the United States, Antmavel 7 08 Nov 2005, 06:22
It is not correct that the people of the United States, cybera 7 16 Jul 2005, 12:59
It is not correct that the people of the United States, karun_aggarwal 8 30 Mar 2005, 14:19
It is not correct that the people of the United States, saurya_s 6 04 Mar 2005, 07:21
Display posts from previous: Sort by

In the United States, 43% of people wear a seat belt while

  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®.