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A recent report determined that although only 3 percent of drivers on

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A recent report determined that although only 3 percent of drivers on  [#permalink]

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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 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 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.

Originally posted by dekko on 04 Oct 2014, 19:45.
Last edited by GMATNinjaTwo on 25 Mar 2018, 15:57, edited 5 times in total.
corrected typo in answer choice (B)
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 04 Oct 2014, 22:23
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3
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. Negating 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.
Correct

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.
Restatement of the Premise

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.
Negation : Many of the vehicles that were ticketed for exceeding the speed limit were not ticketed more than once in the time period covered by the report. This does not break the conclusion.Also the premise talks about the number of vehicles and not the number of tickets.

E) Drivers on Maryland highways exceed the speed limit more often than drivers on other state highways not covered in the report.
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 05 Oct 2014, 18:07
Thanks for the reply: dream21
Between B & D negation helps make the decision.
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post Updated on: 21 May 2017, 08:36
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Hi,

I am not satisfied with the OG explanation, could any one please explain me.

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.

Thanks & regards,
Sheshadri

Originally posted by Sunil01 on 12 Jan 2016, 10:00.
Last edited by broall on 21 May 2017, 08:36, edited 1 time in total.
Merged topic. Please search before posting question.
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 13 Jan 2016, 02:05
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sheshadritalla wrote:
Hi,

I am not satisfied with the OG explanation, could any one please explain me.

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.

Thanks & regards,
Sheshadri


hi,
not one of the best of the Qs in OG...

But we can get to the answer choice,..

lets see with numbers..
total 1000 drivers, out of which 30 have radar detectors installed in their vehicles..
Vehicles ticketed for over speeding... say 66 vehicles..
22 out of 30 with detectors ticketed, whereas 44 out of 970 of others detected..
conclusion :- drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

One should know what is the use of radar detector...
It is to enable the motorists to reduce the speed, as the radar picks up the speed detector placed by police. So, logically they should reduce their speed, after realizing the presence of speed detector..

But the conclusion states the opposite that these drivers get ticketed, even after having radar detector..
Ofcourse there can be reason such as tech advancement not to get detected by radars and drivers getting caught unaware of this technological advancement..

we are asked to connect the conclusion with some assumption..

regularly' is the catch to some extent.. the drivers who are ticketed are prone to increase the speed inspite of presence of detectors in the car..(They love to live on the edge :wink: )..
so B could be an assumption...
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 07 Apr 2017, 08:53
The same question is discussed here also
https://gmatclub.com/forum/a-recent-rep ... ml?kudos=1
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 28 May 2017, 23:09
I was too stuck between option B and D, but notice the quantifier 'Many' used in option D - this need not be assumed. Even few of the drivers can surge the overall %age of the drivers ticketed for exceeding the speed limit.

B is the best option.
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 29 May 2017, 03:36
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this is terribly hard. but we have a magic weapon for all of cr problems. the weapon is to criticize the argument before going to answer choice ( for assumption, weaken, strengthen, flaw questions". if we do not criticize argument before going to answer choices, we die. though the situation you figure out in which the argument is invalid is different from the one in the answer choice, prethingking of criticization is alway valuable fatally.

we can paraphrase the argument as follow: only a few cars are equipped with the detector but a lot of cars ticketted are equipped with the detector. so, the cars with the detectors are more likely to get ticketted.

how to criticize.

find out a situation in which the argument fall apart.

i find out one situation.

if the police hate the cars equipped with the detector, they will fine the cars with the detector more often than the car without it . in this situation, the argument fall apart.

choice B, counter the situation and so is correct.
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post Updated on: 02 Jun 2017, 15:44
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dekko wrote:
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.


Please provide reasons for picking the right answer choice

Fact given is drivers whose vehicles are equipped with radar detectors are ticketed more often for exceeding the speed limit
The conclusion is those with radar detectors exceed the speed limit regularly.

There is a missing information between the fact and the conclusion.

So we have to juxtapose that fact which is drivers who are ticketed for exceeding speed limit are more likely to exceed speed limit than those who are not ticketed to complete the argument.
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Originally posted by SravnaTestPrep on 02 Jun 2017, 00:02.
Last edited by SravnaTestPrep on 02 Jun 2017, 15:44, edited 2 times in total.
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 02 Jun 2017, 14:56
Great explanation, victory47!
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 27 Nov 2017, 03:53
Can someone help me understand the argument. I'm having trouble in understanding and establishing the missing part in the argument
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 27 Nov 2017, 07:57
longhaul123

Were you able to understand the conclusion of the argument?

What according to you, was the reasoning of author that led to this conclusion?

An assumption :
a. must bring in new information but in context of argument.
b. is an ABSOLUTE must for conclusion to be true. If you negate assumption (usually main verb of sentence) then my conclusion falls apart.

Once you fill in gaps, we shall help you reach your goal!
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 30 Nov 2017, 23:09
Was in a dilemma to choose between B & D,eventually chose D. Can anybody please give the explanation of eliminating D without negation ?
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Re: A recent report determined that although only 3 percent of drivers on  [#permalink]

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New post 30 Dec 2017, 17:13
soumya170293 wrote:
Was in a dilemma to choose between B & D,eventually chose D. Can anybody please give the explanation of eliminating D without negation ?

We know that only a small percentage (3%) equip their vehicles with radar detectors. Yet, 1/3 of all vehicles ticketed for exceeding the speed limit were equipped with radar detectors. If, for example, those with radar detectors were JUST AS LIKELY to exceed the speed limit as those without radar detectors, we would expect only about 3% of ticketed vehicles to have radar detectors.

So how do we explain the data? The author suggests that "drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not." That could indeed explain the data. Even though only 3% have radar detectors, if that group is MORE likely to exceed the speed limit, then they will receive MORE than 3% of the tickets.

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.

Does choice (D) have to be true in order for that logic to hold? Remember, the author is simply suggesting that drivers WITH radar are more likely to speed than drivers without radar. That theory could explain the data regardless of whether many of the ticketed vehicles were ticketed more than once. Thus, (D) is not a required assumption.

I hope that helps!
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