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For the last five years, the XYZ Courier Company has made

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For the last five years, the XYZ Courier Company has made [#permalink] New post 10 Mar 2011, 08:15
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For the last five years, the XYZ Courier Company has made regular delivery trips between Town A and Town B. The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes. John, a driver for XYZ, needs to make a personal trip between the two towns; he figures that he should allow approximately 80 minutes for the round trip.

Which of the following, if true, does not call John’s conclusion into question?

a) The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time.

b) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.

d) John will make his personal trip at an hour when XYZ does not make delivery trips.

e) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones.

What is the question type? Assumption / Strengthen / Weaken ?

What is that ans choice C is trying to say?


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Re: XYX Courier Company [#permalink] New post 10 Mar 2011, 08:48
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This is an EXCEPTweaken question. We need to choose the choice that does not weaken the conclusion.

a) The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time. Weakens the conclusion by saying that the trip can take more than 80 mins

b) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.This wekens the conclusion by saying that John might be able to complete the trip before 80 mins

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.No effect on conclusion

d) John will make his personal trip at an hour when XYZ does not make delivery trips.This weakens the conclusion because it will allow john to make the trip faster

e) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones. Again, weakens the conclusion.
So we can see that C is the best choice. When I solved this problem, I was stuck between C and D. Eventually, I figured that D weakens the conclusion because if trucks are not on his route at that time, he may be able to drive faster!!!
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Re: XYX Courier Company [#permalink] New post 10 Mar 2011, 09:13
heygirl wrote:
This is an EXCEPTweaken question. We need to choose the choice that does not weaken the conclusion.

a) The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time. Weakens the conclusion by saying that the trip can take more than 80 mins

b) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.This wekens the conclusion by saying that John might be able to complete the trip before 80 mins

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.No effect on conclusion

d) John will make his personal trip at an hour when XYZ does not make delivery trips.This weakens the conclusion because it will allow john to make the trip faster

e) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones. Again, weakens the conclusion.
So we can see that C is the best choice. When I solved this problem, I was stuck between C and D. Eventually, I figured that D weakens the conclusion because if trucks are not on his route at that time, he may be able to drive faster!!!


Amazing. Thanks.
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Re: XYX Courier Company [#permalink] New post 10 Mar 2011, 09:31
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+1 C

Wow, though one.

A - The congestion is increasing, so it is possible that it will take more time for the round trip.
B. Probably, the car of the driver is a McLaren F1 or a Ferrari F50.
C. Correct.
D. Probably, the driver will make the trip very early in the morning, when there are not many cars.
E. I understand that the average time of 80 minutes includes the 5 years. In this sense, after the freeway was built, the average of the last two years has decreased. Therefore, it is possible that the round trip will take less than 80 minutes.

However, I think this question is not well constructed. The argument should mention that the average is based on the 5-years period.
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Re: XYX Courier Company [#permalink] New post 20 Mar 2011, 03:16
The answer is C because it's irrelevant :

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.

The stimulus says :

The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes.
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XYZ Courier [#permalink] New post 16 May 2011, 15:30
For the last five years, the XYZ Courier Company has made regular delivery trips between Town A and Town B. The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes. John, a driver for XYZ, needs to make a personal trip between the two towns; he figures that he should allow approximately 80 minutes for the round trip.

Which of the following, if true, does not call John’s conclusion into question?

A. The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time.

B. Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.

C. Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.

D. John will make his personal trip at an hour when XYZ does not make delivery trips.

E. Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones.

Please provide explanation for your answer choice. I will upload OA soon. Thank you!
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Re: Hard strengthen question [#permalink] New post 16 May 2011, 18:02
C is the very clear answer. It neither overestimates nor underestimates the time 80 minutes. It is neutral.
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Re: Hard strengthen question [#permalink] New post 16 May 2011, 19:48
since the driver forgot to account for the time taken for loading,packing,unloading etc this has to be spotted in the answer options.

C does exactly this.
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Re: Hard strengthen question [#permalink] New post 16 May 2011, 19:53
its C....as 80 minutes excludes all the non-travel work
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Re: Hard strengthen question [#permalink] New post 16 May 2011, 21:41
For the last five years, the XYZ Courier Company has made regular delivery trips between Town A and Town B. The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes. John, a driver for XYZ, needs to make a personal trip between the two towns; he figures that he should allow approximately 80 minutes for the round trip.

Which of the following, if true, does not call John’s conclusion into question?

CONCLUSION: approx 80 mins is sufficient for the round trip.

A. The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time. (Weakens because congestion adds to the variability of travel time)

B. Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles. (WEAKENS, because the if passenger vehicles are faster, then his time to travel will be less) {Even if travel time is less it weakens the conclusion or calls into question the conclusion}

C. Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself. (CORRECT)

D. John will make his personal trip at an hour when XYZ does not make delivery trips. (WEAKENS, because the 80mins is the time it takes during regular delivery trips)

E. Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones. ( WEAKENS, because if the highways were to be congested on the day he travels then he has to take the highways which means his travel time will be greater than 80 mins)
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Re: XYX Courier Company [#permalink] New post 24 Jun 2011, 21:07
C!...good question this!
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Re: XYX Courier Company [#permalink] New post 25 Jun 2011, 05:51
This is similar to an Except question. We need to find the answer that does not weaken the conclusion. So C is the correct answer.
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good question [#permalink] New post 17 Jul 2011, 05:49
For the last five years, the XYZ Courier Company has made regular delivery trips between Town A and Town B. The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes. John, a driver for XYZ, needs to make a personal trip between the two towns; he figures that he should allow approximately 80 minutes for the round trip.

Which of the following, if true, does not call John’s conclusion into question?

a) The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time.

b) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.

d) John will make his personal trip at an hour when XYZ does not make delivery trips.

e) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones.

Can someone explain what exactly is the question calls for?
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Re: good question [#permalink] New post 17 Jul 2011, 07:58
i think C.

Key is to choose the option that supports the john's conclusion of giving the trip approx 80 mins.
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Re: good question [#permalink] New post 17 Jul 2011, 10:31
IMO C

We have to select an answer that does not effect John's conclusion that he can cover the round trip in approx. 80 mins
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Re: good question [#permalink] New post 17 Jul 2011, 10:41
The answer is C; however, bear my ignorance, my point is that as per the question "does not call John’s conclusion into question" can be interpreted as choose an option that doesn't call John's conclusion that he can cover the round trip in 80 mins into question or doesn't weakens the conclusion. Taking this into consideration, B also points out the courier vehicles are slow as they carry heavy goods and the courier vehicles take 80 mins. Thus, John going on a personal journey can definitely cover the trip in less than 80 mins. So, B also doesn't weaken the conclusion
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Re: good question [#permalink] New post 17 Jul 2011, 10:52
pkmme wrote:
For the last five years, the XYZ Courier Company has made regular delivery trips between Town A and Town B. The average time taken by the company’s drivers to drive the round trip between the two towns, excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes. John, a driver for XYZ, needs to make a personal trip between the two towns; he figures that he should allow approximately 80 minutes for the round trip.

Which of the following, if true, does not call John’s conclusion into question?

a) The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time.

b) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.

d) John will make his personal trip at an hour when XYZ does not make delivery trips.

e) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones.

Can someone explain what exactly is the question calls for?


Calls into question means Weakens an argument. Doesn't call into question is the opposite- Strengthens.

Question type: WeakensX

John thinks it would take him 80 minutes for the entire trip. All but one of the options prove his thinking wrong and here's how:

a) The route between Town A and Town B has been plagued by increasing congestion over the last five years, as the area's population has doubled during that time.
>>>It gives a reason to suspect that the present state of road will cause him more time.
Just a hypothetical scenario:
5 years back-> No congestion-> Speed 130 mph
Now-> Congestion-> Speed 30 mph
Average-> 80 mph
Thus, average speed for last five years is not a good basis to judge the travel time today. Weakens.

b) Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles.
>>>John will be traveling in a passenger car and can potentially travel faster because of less restriction. The travel time can thus be significantly lower.

c) Many of the packages carried by XYZ between Town A and Town B are large, high-security packages, for which the processes of loading, unloading, and delivery can take up to half the length of the trip itself.
>>> average time was calculated "excluding the time taken for loading, unloading, and delivery, over that period has been 80 minutes." Thus, this doesn't weaken his guess.

d) John will make his personal trip at an hour when XYZ does not make delivery trips.
Night times; free road. Faster travel time compared to the travel time during the day when the delivery happens.

e) Before a freeway was built between Town A and Town B two years ago, the only routes between the two towns were state highways with multiple traffic lights and reduced-speed downtown zones.
2 years back-> bad speed-> maybe 50
Now->110 mph
John can make the trip more quickly.
Weaken

Ans: "C"
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Re: good question [#permalink] New post 17 Jul 2011, 10:57
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pkmme wrote:
The answer is C; however, bear my ignorance, my point is that as per the question "does not call John’s conclusion into question" can be interpreted as choose an option that doesn't call John's conclusion that he can cover the round trip in 80 mins into question or doesn't weakens the conclusion. Taking this into consideration, B also points out the courier vehicles are slow as they carry heavy goods and the courier vehicles take 80 mins. Thus, John going on a personal journey can definitely cover the trip in less than 80 mins. So, B also doesn't weaken the conclusion


If you predict that you would score approximately 750 in GMAT.

Scoring an 800 or a 700 would both be considered bad prediction. This argument is similar.

80 mph means 80 mph.
both 130 mph AND 30 mph are bad result.
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Re: good question [#permalink] New post 17 Jul 2011, 17:06
The problem I have with B is that it brings to light another variable to doubt the speeds. That alone is enough to doubt the conclusion.

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Re: Hard strengthen question [#permalink] New post 26 Jul 2011, 01:22
IMO C as well.

The reason being the argument is excludes Loading, uloading etc. time. Hence any option that involves these aspects will have neutral influence.
Re: Hard strengthen question   [#permalink] 26 Jul 2011, 01:22
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