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

It is currently 22 Oct 2014, 00:43

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

CR auto accident victims

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 29 Dec 2007
Posts: 18
Followers: 0

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

CR auto accident victims [#permalink] New post 08 Feb 2008, 21:46
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
This is a critical reasoning question which relies heavily on mathematics, I think...however I just do not understand how to do it.


A recent survey of all auto accident victims in Dole County found that, of the severely injured drivers and front-seat passengers, 80 percent were not wearing seat belts at the time of their accidents. This indicates that, by wearing seat belts, drivers and front-seat passengers can greatly reduce their risk of being severely injured if they are in an auto accident.

The conclusion above is not properly drawn unless which of the following is true?

(A) Of all the drivers and front-seat passengers in the survey, more than 20 percent were wearing seat belts at the time of their accidents.

(B) Considerably more than 20 percent of drivers and front-seat passengers in Dole County always wear seat belts when travelling by car.

(C) More drivers and front-seat passengers in the survey than rear-seat passengers were very severely injured.

(D) More than half of the drivers and front-seat passengers in the survey were not wearing seat belts at the time of their accidents.

(E) Most of the auto accidents reported to police in Dole County do not involve any serious injury.
Director
Director
avatar
Joined: 30 Jun 2007
Posts: 793
Followers: 1

Kudos [?]: 107 [0], given: 0

Re: CR auto accident victims [#permalink] New post 09 Feb 2008, 02:44
Given: 80% were not wearing the seat belts at the time of their accidents.
Conclusion: This indicates that, by wearing seat belts, drivers and front-seat passengers can greatly reduce their risk of being severely injured if they are in an auto accident.

In order to draw the conclusion correctly, we need to answer choice that clearly points the scope of higher number survey members that were wearing the seat belts at the time of their accident and reduce their risk of being severely injured if they are in an auto accident.

For our analysis: Let’s limit number of survey members to one hundred


(A) Of all the drivers and front-seat passengers in the survey, more than 20 percent were wearing seat belts at the time of their accidents.[ Survey members wearing seat belts (X) at the time of their accidents falls into range 21 < X < 100 – this implies not wearing seat belts members (Y) 1 < Y < 20 – Number of severely injured accidents victims = 80% * Y = 16)

(B) Considerably more than 20 percent of drivers and front-seat passengers in Dole County always wear seat belts when traveling by car. [We are interested in members at the time of their accidents – eliminate it]

(C) More drivers and front-seat passengers in the survey than rear-seat passengers were very severely injured.[rear-seat members not mentioned in the argument – eliminate it]

(D) More than half of the drivers and front-seat passengers in the survey were not wearing seat belts at the time of their accidents.[ Members not wearing seat belts(Y) 51< Y < 100 members wearing seat belts 1 < X < 50 - Number of severely injured accidents victims = 80% * Y = 80]

(E) Most of the auto accidents reported to police in Dole County do not involve any serious injury.[What report to police immaterial to argument – eliminate it]

Between A and D: In order to support the conclusion, we require answer choice that indicates lower number accidents victims.

Answer: A
Intern
Intern
avatar
Joined: 29 Dec 2007
Posts: 18
Followers: 0

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

Re: CR auto accident victims [#permalink] New post 09 Feb 2008, 04:33
(A) is indeed correct, but I am not sure how to apply your method...

The question says that "...of the severely injured drivers and front-seat passengers, 80 percent were not wearing seat belts at the time of their accidents." Correct me if I'm wrong, but this is equal to saying that "80 percent of the severely injured drivers and front-seat passengers were not wearing seat belts".

But in your calculations for (A) and (D), you have used the assumption that "80% of those not wearing seat belts are severely injured."

(1) 80% of severely injured are not wearing seat belts

(2) 80% of those not wearing seat belts are severely injured

Do the above two phrases (1) and (2) mean the same thing?
Manager
Manager
User avatar
Joined: 02 Jan 2008
Posts: 159
Followers: 2

Kudos [?]: 57 [0], given: 0

Re: CR auto accident victims [#permalink] New post 09 Feb 2008, 13:06
Take number 100:

The conclusion is drawn on the assumption that there were at least some drivers who didn't get severely injured AND who had seat belts on. The assumption is required - otherwise you would end up questioning what is the point in wearing seat belts when you get injured anyway (assuming all 100 people were severely injured - 80 with seat belts on and 20 without).
Director
Director
avatar
Joined: 30 Jun 2007
Posts: 793
Followers: 1

Kudos [?]: 107 [0], given: 0

Re: CR auto accident victims [#permalink] New post 09 Feb 2008, 15:25
Hi Tom Badgerlock

This is a very good question. The question has following intricacies:
1. Mathematical factor
2. Negation or except rephrasing.


Without mathematical interface:

Given: A major percentage of auto accident victims are found not wearing seat belts. This indicates that, by wearing seat belts, drivers and front-seat passengers can greatly reduce their risk of being severely injured if they are in an auto accident.

The conclusion above is not[*] properly drawn unless which of the following is true?

In other words, which of the following answer choices contradicts the above conclusion: The straight answer choice deemphasizes the conclusion?

- Answer choice must provide information that more than 80% were not wearing seat belts at the time of accidents

(A) Of all the drivers and front-seat passengers in the survey, more than 20 percent were wearing seat belts at the time of their accidents.[ This choice is impossible as more than 20% were wearing the seat-belts – eliminate it]

(D) More than half of the drivers and front-seat passengers in the survey were not wearing seat belts at the time of their accidents.[This is the choice directly supports by wearing seat-belts, server accidents can be minimized – hold it]

The conclusion above is not properly drawn unless which of the following is true?
OR
EXCEPT, the conclusion above is properly drawn unless which of the following is true?


In other words, which of the following answer choices does not contradicts the above conclusion: The straight answer choice emphasizes the conclusion?

- Answer choice must provide information that more than 20% were wearing seat-belts at the time of accident.

(A) Of all the drivers and front-seat passengers in the survey, more than 20 percent were wearing seat belts at the time of their accidents[This makes the conclusion invalid - Hold it]

(D) More than half of the drivers and front-seat passengers in the survey were not wearing seat belts at the time of their accidents.[This choice supports conclusion – eliminate it]

Hope this explains.
Thanks
Intern
Intern
avatar
Joined: 29 Dec 2007
Posts: 18
Followers: 0

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

Re: CR auto accident victims [#permalink] New post 09 Feb 2008, 20:41
Hmm, I think I am getting the hang of it. The assumption I have to make is that there are drivers who wore seat belts and weren't severely injured. Then next would be to find out the strongest answer choice i.e. the choice with more people wearing seat belts and not severely injured.

Obviously (A) then...thanks for your help, hanumayamma and srp! :wink:
Director
Director
User avatar
Joined: 31 Mar 2007
Posts: 586
Location: Canada eh
Followers: 6

Kudos [?]: 39 [0], given: 0

Re: CR auto accident victims [#permalink] New post 11 Feb 2008, 15:58
Straight A
Re: CR auto accident victims   [#permalink] 11 Feb 2008, 15:58
    Similar topics Author Replies Last post
Similar
Topics:
A recent survey of all auto accident victims in Dole County rianah100 9 01 Dec 2005, 05:53
A recent survey of all auto accident victims in Dole County mahesh004 1 19 Nov 2005, 09:06
A recent survey of all auto accident victims in Dole County rahulraao 6 13 Sep 2005, 02:25
A recent survey of all auto accident victims in Dole County shweta_dalmia 16 13 Aug 2005, 09:26
A recent survey of all auto accident victims in Dole County okdongdong 9 04 Jul 2005, 04:33
Display posts from previous: Sort by

CR auto accident victims

  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®.