tough questioin!!!

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 134
Joined: Mon Mar 01, 2010 7:08 am
Thanked: 3 times

tough questioin!!!

by bupbebeo » Sat Jun 05, 2010 7:45 pm
A recent report determined that although only three percent of drivers on Maryland highways equipped their vehicles with radar detectors, thirty-three 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 the 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 the speed limit was greater than the number of vehicles that were equipped with 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 exceeded the speed limit more often than did drivers on other state highways not covered in the report.

Source: Official guide 10, question 171.

OA will be posted later.
Source: — Critical Reasoning |

User avatar
Legendary Member
Posts: 537
Joined: Sun Jul 19, 2009 7:15 am
Location: Nagpur , India
Thanked: 41 times
Followed by:1 members

by rockeyb » Sat Jun 05, 2010 8:34 pm
This is a good question apart from being an assumption question as to what it states clearly there is a paradox situation here that we need to understand before attacking the answer choices .

Lets analyze the question stem first .

Premise 1: A recent report determined that although only three percent of drivers on Maryland highways equipped their vehicles with radar detectors

Premise 2 : thirty-three percent of all vehicles ticketed for exceeding the speed limit were equipped with them.

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

Now the problem we have here is
1: only few people equip their vehicle with radar
2: More no of people who are caught for exceeding speed limit have radar detectors .

Why is this so ? Clearly we have a gap in the conclusion and premise and answer choice must fill this gap .

Lets look at answer choices :


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.
[If this was the case then why were more drivers caught for exceeding speed limit.]
B, Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.
[Now this looks like our answer. If few people had radar and only they were caught for exceeding speed limit .And only these few people repeated the crime more often than those who do not have radar solves the misty and addresses both sides of the discrepancy .]

C, The number of vehicles that were ticketed for exceeding the speed limit was greater than the number of vehicles that were equipped with radar detectors.
[This simply restating the fact from the premise and adds no new information that could fill the logical gap.]

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
[This could be one of the contenders but it says many vehicles and we do not know if these vehicles had radar or not . If they had radar then we have a winner but again we are putting in our own assumption in this case . Since the answer option dose not state explicitly that the vehicles had radar or not we can not be sure. ]

E, Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report.
[State highways is some thing that is clearly out of the scope of the discussion.]

Hope this helps .
"Know thyself" and "Nothing in excess"

Junior | Next Rank: 30 Posts
Posts: 10
Joined: Tue Jun 01, 2010 12:45 am

by TwoB » Sat Jun 05, 2010 8:38 pm
The conclusion is a generalization of the example given regarding Mary land highway drivers.
The first line talks about mary land highway drivers with radar detectors installed saying that they exceed speed limit more often than those drivers without the detectors
The conc extends this behavior to all the drivers.
To extend a specific example to a generalization we need an assumption and that is what is asked in the Q
The assumption is that the vehicles with radar detectors installed in them over speed more often and Maryland highway is just and example to prove the point so hence the generalization follows

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 - is against the conc drawn in the stimulus
C, The number of vehicles that were ticketed for exceeding the speed limit was greater than the number of vehicles that were equipped with radar detectors. - not so relevant as it talks about the number of vehicles ticketed and the number of vehicles with radar detectors. Thi sdoes not prove that the vehicles with radar detectors overspeed than those with out and even if it does we are looking for an assumption made not a support for the conclusion
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 - does not talk on what basis the generalization was made. It just states that the vehicles caught once for overspeed repeated the mistake. The vehicles ticketed more than once could have the radar equipped or otherwise too
E, Drivers on Maryland highways exceeded the speed limit more often than did drivers on other state highways not covered in the report. - first of all this is not an assumption. It weakens the argument by saying that Maryland highway drivers are a special case where the vehicles with radar equipment are caught more and that is not the case in the rest of the highways hence we cannot generalize
IMO B

Legendary Member
Posts: 537
Joined: Fri Jan 22, 2010 10:06 pm
Thanked: 14 times
Followed by:1 members

by frank1 » Sat Jun 05, 2010 9:04 pm
English is funny language....
not is is confusing langauge as well...lol


well
in question
it talks about
detector -----overspeeding----ticketing-----
and makes a conclusion about dectector and ticketing

now the option B talks about overspeeding only...it even doesnt touch anything about detector and make a huge jump and generalize a conclusion
and it is the answer
it is very irony

i know the book says answer is B,so people have started constructing process getting answer
but then dont think it is CRITICAL reasoning question
as it is not 100% logical here

harsh but .....

Master | Next Rank: 500 Posts
Posts: 305
Joined: Mon Jul 27, 2009 5:38 am
Thanked: 10 times

by Shawshank » Sat Jun 05, 2010 11:12 pm
frank1 wrote:English is funny language....
not is is confusing langauge as well...lol


well
in question
it talks about
detector -----overspeeding----ticketing-----
and makes a conclusion about dectector and ticketing

now the option B talks about overspeeding only...it even doesnt touch anything about detector and make a huge jump and generalize a conclusion
and it is the answer
it is very irony

i know the book says answer is B,so people have started constructing process getting answer
but then dont think it is CRITICAL reasoning question
as it is not 100% logical here

harsh but .....
Hey Frank...

All pointers in this question point out to B.
I have not seen this question bfr... but even without checkin out the answer 1st.. i reached B

I dont think this question is confusing...
Refer the Powerscore bible,, to clear you concepts mate.....
++++++++++++++++++++++++++++++
Shawshank Redemtion -- Hope is still alive ...

Junior | Next Rank: 30 Posts
Posts: 10
Joined: Tue Jun 01, 2010 12:45 am

by TwoB » Sat Jun 05, 2010 11:27 pm
point 1) In a CR Q its explicitly mentioned u have to pick the BEST of the options given ...
Point 2) as per ur argument there r only 2 options wid word radar detector in them..... A and C
now logically
out of A B and C
A is a complete contradiction so not by even a single percent that can be marked the answer
The number of vehicles that were ticketed > Number of vehicles with radar detectors does not make
any sense to me atleast to my logic
Yes may be we can have a better answer if we were deciding the Q paper but unfortunately its not the case
and the best fit would be B which would be the case if we try to justify each answer.
Any other valid Logical valid justification for A orC would be gladly welcomed and is awaited too :)

frank1 wrote:English is funny language....
not is is confusing langauge as well...lol


well
in question
it talks about
detector -----overspeeding----ticketing-----
and makes a conclusion about dectector and ticketing

now the option B talks about overspeeding only...it even doesnt touch anything about detector and make a huge jump and generalize a conclusion
and it is the answer
it is very irony

i know the book says answer is B,so people have started constructing process getting answer
but then dont think it is CRITICAL reasoning question
as it is not 100% logical here

harsh but .....

Legendary Member
Posts: 537
Joined: Fri Jan 22, 2010 10:06 pm
Thanked: 14 times
Followed by:1 members

by frank1 » Sun Jun 06, 2010 1:20 am
Shawshank wrote:
frank1 wrote:English is funny language....
not is is confusing langauge as well...lol


well
in question
it talks about
detector -----overspeeding----ticketing-----
and makes a conclusion about dectector and ticketing

now the option B talks about overspeeding only...it even doesnt touch anything about detector and make a huge jump and generalize a conclusion
and it is the answer
it is very irony

i know the book says answer is B,so people have started constructing process getting answer
but then dont think it is CRITICAL reasoning question
as it is not 100% logical here

harsh but .....
Hey Frank...

All pointers in this question point out to B.
I have not seen this question bfr... but even without checkin out the answer 1st.. i reached B

I dont think this question is confusing...
Refer the Powerscore bible,, to clear you concepts mate.....
no offence mate...
but lots of people seem to 'read the things by HARD' rather than going with logic...
ok they say so ....oh yes...lets dig reason for it....

I know nobody can win with them ...but atleast you need to go through some logic....

your choosing B directly doesnt cover the point i have raised....

detector -----overspeeding----ticketing-----
and makes a conclusion about dectector and ticketing

now the option B talks about overspeeding only...
it makes huge generalization ....
in other question we would have said 'it is out ot scope' but as it is said that B is answer people have started digging reason for it...
but think with a cool mind and logic...it doesnt make 100% sense...
GMAT score is equally counted as your GPA and 78 clicks can change you life.

Master | Next Rank: 500 Posts
Posts: 134
Joined: Mon Mar 01, 2010 7:08 am
Thanked: 3 times

by bupbebeo » Sun Jun 06, 2010 10:16 pm
thank you for all your contribution!!! The OA is B.

GMAT Instructor
Posts: 1302
Joined: Mon Oct 19, 2009 2:13 pm
Location: Toronto
Thanked: 539 times
Followed by:164 members
GMAT Score:800

by Testluv » Sun Jun 06, 2010 10:21 pm
I discussed this question in some detail (over 2 posts) here:

https://www.beatthegmat.com/maryland-ass ... 47601.html

(It is to your benefit to use the search function!)
Kaplan Teacher in Toronto

Legendary Member
Posts: 537
Joined: Fri Jan 22, 2010 10:06 pm
Thanked: 14 times
Followed by:1 members

by frank1 » Mon Jun 07, 2010 3:46 am
and as the tropic head reads
it is 'tough' because answer is illogical or out of scope generalization
lol
GMAT score is equally counted as your GPA and 78 clicks can change you life.

Master | Next Rank: 500 Posts
Posts: 140
Joined: Fri Feb 05, 2010 2:43 pm
Thanked: 3 times
GMAT Score:720

by analyst218 » Mon Jun 07, 2010 12:01 pm
D is out because one can exceed the speed limit and not get ticketed.