It is currently 19 Feb 2018, 23:56

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

Riders who wear bicycle helmets can greatly reduce the risk of

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Retired Moderator
User avatar
Joined: 06 Jul 2014
Posts: 1269
Location: Ukraine
Concentration: Entrepreneurship, Technology
GMAT 1: 660 Q48 V33
GMAT 2: 740 Q50 V40
GMAT ToolKit User Premium Member
Riders who wear bicycle helmets can greatly reduce the risk of [#permalink]

Show Tags

New post 24 Aug 2015, 11:58
3
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

70% (00:53) correct 30% (01:29) wrong based on 173 sessions

HideShow timer Statistics

Riders who wear bicycle helmets can greatly reduce the risk of significant injury. Therefore, doctors working in an emergency room can expect that out of cyclists admitted to hospitals those wearing bicycle helmets will have injuries that are less severe than those not wearing a helmet.

Which of the following is necessary to evaluate the argument?

A) The probability that those cyclists admitted to an emergency room have suffered similar accidents in the past
B) The durability of bicycle helmets over the course of many years
C) The number of riders wearing bicycle helmets compared to the number not wearing helmets
D) Whether the bicycling activities of cyclists using a helmet differs from the activities of those not wearing a helmet
E) The number of medical staff who are in the emergency room when an injured cyclist arrives
[Reveal] Spoiler: OA

_________________

Simple way to always control time during the quant part.
How to solve main idea questions without full understanding of RC.
660 (Q48, V33) - unpleasant surprise
740 (Q50, V40, IR3) - anti-debrief ;)

Expert Post
2 KUDOS received
Magoosh GMAT Instructor
User avatar
G
Joined: 28 Dec 2011
Posts: 4680
Re: Riders who wear bicycle helmets can greatly reduce the risk of [#permalink]

Show Tags

New post 24 Aug 2015, 13:13
2
This post received
KUDOS
Expert's post
1
This post was
BOOKMARKED
Harley1980 wrote:
Riders who wear bicycle helmets can greatly reduce the risk of significant injury. Therefore, doctors working in an emergency room can expect that out of cyclists admitted to hospitals those wearing bicycle helmets will have injuries that are less severe than those not wearing a helmet.

Which of the following is necessary to evaluate the argument?

A) The probability that those cyclists admitted to an emergency room have suffered similar accidents in the past
B) The durability of bicycle helmets over the course of many years
C) The number of riders wearing bicycle helmets compared to the number not wearing helmets
D) Whether the bicycling activities of cyclists using a helmet differs from the activities of those not wearing a helmet
E) The number of medical staff who are in the emergency room when an injured cyclist arrives

Dear Harley1980,
I'm happy to respond. :-) This question was written by my friend Chris Lele at Magoosh.

The prompt makes a distinction between bicyclist with vs. without helmets, concluding that the latter will have more severe head injuries. Certainly if all bicyclists do approximately the same things, then all things being equal, having a helmet would prevent more serious injuries. The trouble is: it's not tenable to assume that all bicyclists do more or less the same things. What if the true daredevils, doing crazy dangerous moves, all wear helmets, and the bicyclists who don't wear helmets are only doing the very safest things, on flat paved surfaces with no traffic nearby? It would be conceivable that, despite helmets the daredevils would get more serious head injuries than do the folks without helmets doing super-safe things.

That is a weakener. Sometimes the point "necessary to evaluate" follows the logic of a strengthener or a weakener.

Here, let's look at the answer choices.
(A) The probability that those cyclists admitted to an emergency room have suffered similar accidents in the past
Getting a head injury before might lead to a more serious injury this time. But this does not allow us to draw any distinction between bicyclists with vs. without helmets.

(B) The durability of bicycle helmets over the course of many years
This would be more relevant if we were comparing bicyclists with old helmets vs. with new helmets. We don't know anything about the ages of the helmets for those using helmets. This doesn't tell us anything about folks with vs. without helmets.

(C) The number of riders wearing bicycle helmets compared to the number not wearing helmets
Interesting, but the prompt is not numerical. It says "more serious head injuries" --- this may imply an average or may be about, say, the top 10% worst head injuries. In neither case would absolute numbers matter, whether one group was larger or smaller than the other group in terms of sheer numbers. This is irrelevant.

(D) Whether the bicycling activities of cyclists using a helmet differs from the activities of those not wearing a helmet
This is connected to the weakener we were exploring above. If all high-risk daredevils are helmet wearers, and all non-helmet wearers are doing super-safe risk-free things, then that might undercut the argument, as we saw above. This is promising as an answer.

(E) The number of medical staff who are in the emergency room when an injured cyclist arrives
Again, does not allow us to make a distinction between bicyclists with vs. without helmets.

The best answer is (D).

Does this make sense?
Mike :-)
_________________

Mike McGarry
Magoosh Test Prep

Image

Image

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Non-Human User
User avatar
Joined: 01 Oct 2013
Posts: 10323
Premium Member
Re: Riders who wear bicycle helmets can greatly reduce the risk of [#permalink]

Show Tags

New post 15 Jan 2018, 03:46
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: Riders who wear bicycle helmets can greatly reduce the risk of   [#permalink] 15 Jan 2018, 03:46
Display posts from previous: Sort by

Riders who wear bicycle helmets can greatly reduce the risk of

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


cron

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®.