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Re: In the nation of Partoria, large trucks currently account [#permalink]
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oanhsokie wrote:
Hi, this CR i took from Thursday with Ron video. However I still do not understand how the correct answer makes sense.

In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria's roads but are involved in 12 percent of all highway fatalities. The very largest trucks — those with three trailers — had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths would be to require shippers to increase their use of triple-trailer trucks.

Which of the following, if true, most seriously weakens the argument?

(A) Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only.

(B) No matter what changes Partoria makes in the regulation of trucking, it will keep some smaller roads off-limits to all large trucks.

(C) Very few fatal collisions involving trucks in Partoria are collisions between two trucks.

(D) In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.

(E) In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks



Reasons to eliminate answers.

B - Incorrect, This statement states what would happen in future if the conclusion is true. Supports the argument
C - Irrelevant, This statement provide about the trucks. we need information about triple-trailer truck vs single and double trailer truck
D - Irrelevant, This gives extra information and doesn't weak the argument.
E - Though this statement tells about triple-trailer truck and single-trailer truck, it doesn't weaken.

A - Weakens, Triple-trailer truck were used only in lightly traveled section of highways. we cannot conclude that triple-trailer truckers are better than single and double trailer trucker.
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Re: In the nation of Partoria, large trucks currently account [#permalink]
chetan2u wrote:
oanhsokie wrote:
Hi, this CR i took from Thursday with Ron video. However I still do not understand how the correct answer makes sense.

In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria's roads but are involved in 12 percent of all highway fatalities. The very largest trucks — those with three trailers — had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths would be to require shippers to increase their use of triple-trailer trucks.

Which of the following, if true, most seriously weakens the argument?

(A) Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only.

(B) No matter what changes Partoria makes in the regulation of trucking, it will keep some smaller roads off-limits to all large trucks.

(C) Very few fatal collisions involving trucks in Partoria are collisions between two trucks.

(D) In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.

(E) In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks



Hi...
The crux is that " three trailer trucks are involved in less number of accidents as compared to two and single trailer truck."
From this the author concluded that we should shift towards three trailer.

We have to weaken it..

I'll just explain A as it is the clear answer.

A tells us that 3-trailer are used in very lightly traveled roads.

From this we can conclude that the usage of 3-trailer trucks has been only on roads which are less likely to have a collision. So we cannot claim less number of accidents of 3-trailer to the truck itself but to outside factor that is road.
So it punches a hole in the argument that 3-traliet are more safe.



I kinda understand it clearer. So i thought the logic reasoning here is that
Conclusion : triple trailer trucks w low accident rate should be used in order to reduce highway death rates
Pre-think: Is there any other reason which makes triple trailer trucks should be used? (rather than its low accident rate)

then option A makes sense here.
That it's becuz Triple trailer trucks are used in lightly traveled road only -> it can reduce highway death rates (another cause founded)
Am I right?
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Re: In the nation of Partoria, large trucks currently account [#permalink]
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Hi There,

Imagine someone is doing only doing 600 level GMAT questions - accuracy rate should be high.
Now, if some other one is doing 600 plus 700 level questions - the hard stuff and the easy stuff - accuracy rate will take a hit.

A is saying
Large truck is only doing 600 questions, i.e. lightly traveled sections of major highways only..
Other trucks doing all sort of different questions (and dealing with all sort of idiots on the road!)

Easy A

Cheers
RzS

oanhsokie wrote:
Hi, this CR i took from Thursday with Ron video. However I still do not understand how the correct answer makes sense.

In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria's roads but are involved in 12 percent of all highway fatalities. The very largest trucks — those with three trailers — had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths would be to require shippers to increase their use of triple-trailer trucks.

Which of the following, if true, most seriously weakens the argument?

(A) Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only.

(B) No matter what changes Partoria makes in the regulation of trucking, it will keep some smaller roads off-limits to all large trucks.

(C) Very few fatal collisions involving trucks in Partoria are collisions between two trucks.

(D) In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.

(E) In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks
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Re: In the nation of Partoria, large trucks currently account [#permalink]
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IMO Answer A
From the argument we can conclude that the usage of 3-trailer trucks has been only on roads which are less likely to have a collision. So we cannot claim less number of accidents of 3-trailer to the truck itself but to outside factor that is road.
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Re: In the nation of Partoria, large trucks currently account [#permalink]
lichting wrote:
Hi, this CR i took from Thursday with Ron video. However I still do not understand how the correct answer makes sense.


In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria's roads but are involved in 12 percent of all highway fatalities. The very largest trucks — those with three trailers — had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths would be to require shippers to increase their use of triple-trailer trucks.

Which of the following, if true, most seriously weakens the argument?

(A) Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only.

(B) No matter what changes Partoria makes in the regulation of trucking, it will keep some smaller roads off-limits to all large trucks.

(C) Very few fatal collisions involving trucks in Partoria are collisions between two trucks.

(D) In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.

(E) In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks


wkn the arg:

[prem] lrgts are 6% of miles roads but only 12% of rips–vlrgts had even less rips vs lrgts;
[con] so, to reduce rips, lrgts should become vlrgts!

why should we add more trailers to lrg trucks? because a study showed that verylarge had fewers rips vs large; but, wat if there was only 1 verylarge and 10 largetrucks? then 1 did 1/3 of rips and 10 did 2/3; thus if all were verylarge then rips would be huge! <= think of something that shows an unbalanced relation between verylarge vs large trucks;

(E) irrelevant;
(D) irrelevant;
(C) irrelevant;
(B) irrelevant;

Answer (A): yes, this attacks the premise, num of verylrg have less rips bc they travel in less pop roads, while lrgtrucks travel in most pop roads = more rips!
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Re: In the nation of Partoria, large trucks currently account [#permalink]
No offense but the explanations here make no sense whatsoever. It doesn't need to be this complicated.

In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria's roads but are involved in 12 percent of all highway fatalities. The very largest trucks — those with three trailers — had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths would be to require shippers to increase their use of triple-trailer trucks.


Here is why A is correct:

We are told large trucks account for 12% of all HIGHWAY FATALITIES even though ALL Trucks account for only 6% of all miles driven.

The plan is to swap over to 3 trailer trucks to reduce fatalities

This is flawed because A tells us that the ONLY Type of truck used on HIGHWAYS and thus the only type of truck contributing to the 12% fatality rate is three-trailer trucks

(A) Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only.
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Re: In the nation of Partoria, large trucks currently account [#permalink]
someone please explain option E??
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Re: In the nation of Partoria, large trucks currently account [#permalink]
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lichting wrote:
Hi, this CR i took from Thursday with Ron video. However I still do not understand how the correct answer makes sense.


In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria's roads but are involved in 12 percent of all highway fatalities. The very largest trucks — those with three trailers — had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths would be to require shippers to increase their use of triple-trailer trucks.

Which of the following, if true, most seriously weakens the argument?

(A) Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only.

(B) No matter what changes Partoria makes in the regulation of trucking, it will keep some smaller roads off-limits to all large trucks.

(C) Very few fatal collisions involving trucks in Partoria are collisions between two trucks.

(D) In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.

(E) In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks



Hi @AbhishekDhanraJ72...

The crux is that " three trailer trucks are involved in less number of accidents as compared to two and single trailer truck."
From this the author concluded that we should shift towards three trailer to reduce the number of deaths on roads.

E) In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks[/quote]
We are looking for change over to reduce the deaths resulting from the road accidents. This tells us that what one triple trailer truck carries is LESS than what 3 of the single-trailer can carry. So what?
We cannot even say here which is more economical as no data on price per mile for each is given leave aside the safety factor.
In the para, nowhere is payload connected to deaths or road accidents, and nowhere it is given that we can relate miles on road to the deaths.
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Re: In the nation of Partoria, large trucks currently account [#permalink]
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