GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 20 Jun 2018, 15:23

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

QOTD: A recent report determined that although only 3

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

Hide Tags

Expert Post
MBA Section Director
User avatar
V
Joined: 19 Mar 2012
Posts: 5180
Location: India
GMAT 1: 760 Q50 V42
GPA: 3.8
WE: Marketing (Non-Profit and Government)
QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 23 Jan 2018, 23:30
14
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

48% (01:45) correct 52% (02:00) wrong based on 481 sessions

HideShow timer Statistics

Verbal Question of The Day: Day 207: Critical Reasoning


Subscribe to GMAT Question of the Day: E-mail | RSS
For All QOTD Questions Click Here


A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion drawn above depends on which of the following assumptions?

(A) Drivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not.

(B) Drivers who are ticketed for exceeding speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.

(C) The number of vehicles that were ticketed for exceeding speed limit was greater than the number of vehicles that were equipped with the radar detectors.

(D) Many of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report.

(E) Drivers on Maryland highways exceed the speed limit more often than drivers on other state highways not covered in the report.

Every question of the day will be followed by an expert reply by GMATNinja in 12-15 hours. Stay tuned! Post your answers and explanations to earn kudos.

_________________

Have an MBA application Question? ASK ME ANYTHING!

My Stuff: Four Years to 760 | MBA Trends for Indian Applicants

My GMAT Resources
V30-V40: How to do it! | GMATPrep SC | GMATPrep CR | GMATPrep RC | Critical Reasoning Megathread | CR: Numbers and Statistics | CR: Weaken | CR: Strengthen | CR: Assumption | SC: Modifier | SC: Meaning | SC: SV Agreement | RC: Primary Purpose | PS/DS: Numbers and Inequalities | PS/DS: Combinatorics and Coordinates

My MBA Resources
Everything about the MBA Application | Over-Represented MBA woes | Fit Vs Rankings | Low GPA: What you can do | Letter of Recommendation: The Guide | Indian B Schools accepting GMAT score | Why MBA?

My Reviews
Veritas Prep Live Online

Expert Post
3 KUDOS received
GMAT Club Verbal Expert
User avatar
P
Status: GMAT and GRE tutor
Joined: 13 Aug 2009
Posts: 1749
Location: United States
GMAT 1: 780 Q51 V46
GMAT 2: 800 Q51 V51
GRE 1: 340 Q170 V170
QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 23 Jan 2018, 23:44
3
1
5
Quote:
A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion drawn above depends on which of the following assumptions?

Well, if the conclusion is mentioned in the question itself, then I guess we should start by making sure we're 100% clear about the language in the conclusion:

    "...drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not."

Great. And since this is a runty little two-sentence passage, the evidence to support the conclusion is pretty straightforward:

    "...although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them."

A few details of language jump out at me in this passage, though. For starters, the conclusion emphasizes that drivers who equip their vehicles with radar detectors are more likely to actually exceed the speed limit regularly than drivers who do not. And it's interesting to me that the evidence focuses on the percentage of ticketed vehicles that were equipped with radar detectors.

So if we're looking for an assumption, then we probably will need something that connects the conclusion (i.e., that drivers with radar detectors actually exceed the speed limit regularly) with the evidence about speeding tickets. And as always, you can think of an assumption as something that not only strengthens or reinforces the conclusion, but also is necessary to draw that conclusion.

Quote:
(A) Drivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not.

(A) strengthens the conclusion: if drivers with the radar detectors are LESS likely to be ticketed than drivers without them, then the drivers with radar detectors must exceed the speed limit even MORE often than it initially seemed based on the argument.

Trouble is, the question isn't asking us to strengthen the argument; it's asking us to identify a necessary assumption. And we don't need to assume that drivers with radar detectors are less likely to be ticketed than other drivers. After all, 33% of ticketed vehicles have radar detectors, while only 3% of all vehicles have radar detectors, so if vehicles with radar detectors are just equally likely to receive tickets when they exceed the speed limit, the conclusion could still hold. Heck, drivers with radar detectors could even be somewhat more likely to receive tickets -- and as long as the disparity isn't huge, the conclusion could still hold.

So we certainly don't need to assume that vehicles with radars are LESS likely to receive tickets. (A) is out.

Quote:
(B) Drivers who are ticketed for exceeding speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.

This answer choice seems so lame and obvious -- of course you're more likely to exceed the speed limit if you receive more speeding tickets, right? -- that I kind of want to ignore it completely. But that would be a bad thing to do.

Let's come back to the argument: the conclusion says that people with radar detectors ACTUALLY exceed the speed limit more often than drivers without them, but the evidence in the passage only mentions the fact that vehicles with radar detectors receive a disproportionate percentage of TICKETS for speeding. So we absolutely do need to assume that drivers who receive tickets are more likely to actually exceed the speed limit. Otherwise, there's no connection whatsoever between the evidence and the conclusion.

So let's keep (B).

Quote:
(C) The number of vehicles that were ticketed for exceeding speed limit was greater than the number of vehicles that were equipped with the radar detectors.

There's no reason why we would need to assume this in order to draw the conclusion. We already know that 3% of drivers equipped their vehicles with radar detectors, and it doesn't really matter whether 6% of all vehicles or 2% of all vehicles receive speeding tickets: either way, it wouldn't change the fact (stated in the passage!) that vehicles with radar detectors receive a disproportionate percentage of those tickets. And more importantly, it wouldn't help us figure out whether drivers with radar detectors are more likely to actually exceed the speed limit.

So (C) is gone.

Quote:
(D) Many of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report.

(D) is kind of interesting, but it doesn't actually help us draw the conclusion.

For starters, we don't know which vehicles were ticketed more than once: if the vehicles with radar detectors were more likely to receive multiple tickets, then it would reinforce the idea that vehicles with radar detectors receive TONS of tickets. But it could also go in the other direction: if vehicles WITHOUT radar detectors were more likely to receive multiple tickets, then it would weaken the force of the evidence in the passage, and undermine the conclusion. For that reason alone, we could ditch (D).

And just as importantly: remember that the conclusion discusses the likelihood that drivers actually exceed the speed limit. (D) doesn't help us reinforce this conclusion at all, because it just tells us something about the number of tickets received for speeding.

So we can eliminate (D), too.

Quote:
(E) Drivers on Maryland highways exceed the speed limit more often than drivers on other state highways not covered in the report.

Who gives a crap? The entire scope of the passage is about drivers in Maryland, and the conclusion is concerned with differences in behavior between drivers with and without radar detectors in Maryland. Comparing Maryland drivers to non-Maryland drivers can't possibly have any impact whatsoever on the conclusion.

So we can eliminate (E), and (B) is the best answer.
_________________

GMAT Club Verbal Expert | GMAT/GRE tutor @ www.gmatninja.com (Now hiring!) | GMAT blog | Food blog | Notoriously bad at PMs

Beginners' guides to GMAT verbal
Reading Comprehension | Critical Reasoning | Sentence Correction

YouTube LIVE verbal webinars
Series 1: Fundamentals of SC & CR | Series 2: Developing a Winning GMAT Mindset

SC & CR Questions of the Day (QOTDs), featuring expert explanations
All QOTDs | Subscribe via email | RSS

Need an expert reply?
Hit the request verbal experts' reply button -- and please be specific about your question. Feel free to tag @GMATNinja and @GMATNinjaTwo in your post. Priority is always given to official GMAT questions.

Sentence Correction articles & resources
How to go from great (760) to incredible (780) on GMAT SC | That "-ing" Word Probably Isn't a Verb | That "-ed" Word Might Not Be a Verb, Either | No-BS Guide to GMAT Idioms | "Being" is not the enemy | WTF is "that" doing in my sentence?

Reading Comprehension, Critical Reasoning, and other articles & resources
All GMAT Ninja articles on GMAT Club | Using LSAT for GMAT CR & RC |7 reasons why your actual GMAT scores don't match your practice test scores | How to get 4 additional "fake" GMAT Prep tests for $29.99 | Time management on verbal

Senior Manager
Senior Manager
User avatar
G
Joined: 24 Jun 2012
Posts: 337
Location: Pakistan
Concentration: Strategy, International Business
GPA: 3.76
GMAT ToolKit User Reviews Badge
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 23 Jan 2018, 23:49
Its B
the one who are ticketed for exceeding speed limit are more likely to exceed the speed limit on regular basis.
A weakens
C questions is talking about %age and this option is about number of vehicals
D its an additional information that support the conclusion but negating this wont hurt the conclusion. Important thing is that one should know the difference between assumption and strengthen questions.
E irrelevant...What drivers in other state doing is none of our business
_________________

Push yourself again and again. Don't give an inch until the final buzzer sounds. -Larry Bird
Success isn't something that just happens - success is learned, success is practiced and then it is shared. -Sparky Anderson
-S

2 KUDOS received
Manager
Manager
User avatar
G
Joined: 01 Jun 2015
Posts: 234
Location: India
Concentration: Strategy, International Business
GMAT 1: 620 Q48 V26
GMAT ToolKit User
QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 23 Jan 2018, 23:51
2
Mathematical approaches are always good to solve this kind of questions.
What we have got so far:
1) 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors
2) 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them.

Assuming there are 1000 drivers on Maryland highways. 3% or 30 cars are equipped with radar detectors.
Let's say 200 cars were ticketed for speeding. 33% or 66 cars were equipped with radar detectors.
Now out of 200 ticketed cars 66 are those with radars and 134 are without them.
But there are only 30 cars with radars so far.That means of those 30 drivers some were ticketed more than once.
So,Drivers who are ticketed for exceeding speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.

This is exactly what option B says.
Remember option D is a trap answer as it talks about all the drivers,no for drivers with radar equipment.
Senior Manager
Senior Manager
avatar
G
Joined: 31 Jul 2017
Posts: 368
Location: Malaysia
WE: Consulting (Energy and Utilities)
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 24 Jan 2018, 09:45
souvik101990 wrote:

Verbal Question of The Day: Day 207: Critical Reasoning


Subscribe to GMAT Question of the Day: E-mail | RSS
For All QOTD Questions Click Here


A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion drawn above depends on which of the following assumptions?

(A) Drivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not.

(B) Drivers who are ticketed for exceeding speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.

(C) The number of vehicles that were ticketed for exceeding speed limit was greater than the number of vehicles that were equipped with the radar detectors.

(D) Many of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report.

(E) Drivers on Maryland highways exceed the speed limit more often than drivers on other state highways not covered in the report.

Every question of the day will be followed by an expert reply by GMATNinja in 12-15 hours. Stay tuned! Post your answers and explanations to earn kudos.


A - Its clearly against the stats mentioned in the passage.
B - This is it.
C - Let there be 100 Vehicles. Only 3 are Equipped with Radar, out of this one was ticketed for exceeding the limit. This option says complete opposit.
D - The passage never says anything about the time period.
E - This is irrelevant.
_________________

If my Post helps you in Gaining Knowledge, Help me with KUDOS.. !!

Manager
Manager
avatar
S
Joined: 01 Feb 2017
Posts: 137
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 24 Jan 2018, 13:46
Authors Assumption:

No. of cars with Radar detector are much lesser (3% of total cars) than no. of overspeeding tickets issued to these cars (33% of all speeding tickets).

Hence, the drivers of these cars are repeated offenders.

Hence, Correct Ans is B

Posted from my mobile device
Senior Manager
Senior Manager
User avatar
P
Joined: 29 Jun 2017
Posts: 499
GPA: 4
WE: Engineering (Transportation)
GMAT ToolKit User Premium Member Reviews Badge
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 19 Feb 2018, 17:32
GMATNinja wrote:
Reserved for OE by GMATNinja


GMATNinja kindly use your reserved space :-) , I have a little doubt between B and D kindly enlighten me.
_________________

Give Kudos for correct answer and/or if you like the solution.

Expert Post
GMAT Club Verbal Expert
User avatar
P
Status: GMAT and GRE tutor
Joined: 13 Aug 2009
Posts: 1749
Location: United States
GMAT 1: 780 Q51 V46
GMAT 2: 800 Q51 V51
GRE 1: 340 Q170 V170
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 19 Feb 2018, 21:01
sahilvijay wrote:

GMATNinja kindly use your reserved space :-) , I have a little doubt between B and D kindly enlighten me.

Thank you for tagging me in this, sahilvijay! This question somehow slipped past me. Bad ninja!

Explanation is posted now -- just let me know if you have any lingering doubts.
_________________

GMAT Club Verbal Expert | GMAT/GRE tutor @ www.gmatninja.com (Now hiring!) | GMAT blog | Food blog | Notoriously bad at PMs

Beginners' guides to GMAT verbal
Reading Comprehension | Critical Reasoning | Sentence Correction

YouTube LIVE verbal webinars
Series 1: Fundamentals of SC & CR | Series 2: Developing a Winning GMAT Mindset

SC & CR Questions of the Day (QOTDs), featuring expert explanations
All QOTDs | Subscribe via email | RSS

Need an expert reply?
Hit the request verbal experts' reply button -- and please be specific about your question. Feel free to tag @GMATNinja and @GMATNinjaTwo in your post. Priority is always given to official GMAT questions.

Sentence Correction articles & resources
How to go from great (760) to incredible (780) on GMAT SC | That "-ing" Word Probably Isn't a Verb | That "-ed" Word Might Not Be a Verb, Either | No-BS Guide to GMAT Idioms | "Being" is not the enemy | WTF is "that" doing in my sentence?

Reading Comprehension, Critical Reasoning, and other articles & resources
All GMAT Ninja articles on GMAT Club | Using LSAT for GMAT CR & RC |7 reasons why your actual GMAT scores don't match your practice test scores | How to get 4 additional "fake" GMAT Prep tests for $29.99 | Time management on verbal

Senior Manager
Senior Manager
avatar
B
Joined: 29 Jun 2017
Posts: 318
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 20 Feb 2018, 00:49
souvik101990 wrote:

Verbal Question of The Day: Day 207: Critical Reasoning


Subscribe to GMAT Question of the Day: E-mail | RSS
For All QOTD Questions Click Here


A recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion drawn above depends on which of the following assumptions?

(A) Drivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not.

(B) Drivers who are ticketed for exceeding speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.

(C) The number of vehicles that were ticketed for exceeding speed limit was greater than the number of vehicles that were equipped with the radar detectors.

(D) Many of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report.

(E) Drivers on Maryland highways exceed the speed limit more often than drivers on other state highways not covered in the report.

Every question of the day will be followed by an expert reply by GMATNinja in 12-15 hours. Stay tuned! Post your answers and explanations to earn kudos.


this terrible question is hard.
i alway begin by try to attack the argument.
the argument provide the statistics and concludes that the driver with the radars are more likely to exceed the limit speed. the argument will fall apart if the statistics is not representative. it is possible that the drivers with radar are hated by police and are fine more frequently.

choice B, protect the argument by showing that the statistics is representative and typical. this mean the drivers with the radars themself normally exceed the limit speed.

the argument is typical but very hard because the author ask about very obvious assumption.

the only weapon for us is to find out the way to attack the argument and with practice we can solve this kind of problem. so, be confident and practice.
Intern
Intern
avatar
B
Joined: 29 Sep 2016
Posts: 6
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 05 Jun 2018, 17:41
Explanation is posted now -- just let me know if you have any lingering doubts.[/quote]

Hi Gmat Ninja
D specifies that more likely means that more than once. B also says the same but in a generic manner. In B, how can we assume that more likely ticketed ones are the ones with radar. Why can't we assume in case of D that the ones ticketed more than once are the ones with radar equipped cars.
Director
Director
User avatar
P
Joined: 23 Sep 2015
Posts: 511
GMAT ToolKit User Reviews Badge
Re: QOTD: A recent report determined that although only 3 [#permalink]

Show Tags

New post 12 Jun 2018, 18:56
Premise:
1. Let say there are 1000 drivers in M and only 30(3%) have R.
2. Let say 100 vehicle got ticket in this duration.
3. 33 vehicles are ticketed were equipped with R. how come 3 vehicles extra.

Conclusion:
drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

Pre-thinking:
Few drivers were regularly exceeding speed and getting tickets for that. few drivers were not exceeding. while few were exceeding multiple times that is how this can be achieved.

The conclusion drawn above depends on which of the following assumptions?

(A) Drivers who equip their vehicles with radar detectors are less likely to be ticketed for exceeding the speed limit than are drivers who do not. --- Let just say this is true, it means they are using R well. Strengthening the conclusion. Negetion of it will not break the conclusion.

(B) Drivers who are ticketed for exceeding speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed. --- on line of pre-thinking.

(C) The number of vehicles that were ticketed for exceeding speed limit was greater than the number of vehicles that were equipped with the radar detectors. --- not solving the problem here.

(D) Many of the vehicles that were ticketed for exceeding the speed limit were ticketed more than once in the time period covered by the report. --- close trap. what if only non radar guys are doing this.

(E) Drivers on Maryland highways exceed the speed limit more often than drivers on other state highways not covered in the report. --- OUT of scope.
_________________

Thanks!
Do give some kudos.

Best Gmat Resource:
GmatPrep CR|GmatPrep SC|GmatPrep RC

Re: QOTD: A recent report determined that although only 3   [#permalink] 12 Jun 2018, 18:56
Display posts from previous: Sort by

QOTD: A recent report determined that although only 3

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


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.