For the last five years, the XYZ Courier Company has made : GMAT Critical Reasoning (CR)
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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]

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09 Dec 2011, 19:35
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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?

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.

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

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.

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

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.
[Reveal] Spoiler: OA
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10 Dec 2011, 01:14
ruturajp 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?

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. => this sentence make the time spending more than 80 min

Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles. => make shorter time, <80 min

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. => does not affect anymore to the time spending for personal trip

John will make his personal trip at an hour when XYZ does not make delivery trips. => clearly <80min

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. => now, free way was built, make the time spending for the trip is less

This kind of question is Weakening EXCEPT
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10 Dec 2011, 05:29
tuanquang269 wrote:
ruturajp 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?

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. => this sentence make the time spending more than 80 min

Most of XYZ’s courier vehicles are heavy trucks, for which speed limits are lower than for passenger vehicles. => make shorter time, <80 min

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. => does not affect anymore to the time spending for personal trip

John will make his personal trip at an hour when XYZ does not make delivery trips. => clearly <80min

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. => now, free way was built, make the time spending for the trip is less

This kind of question is Weakening EXCEPT

I am still confused..please explain it more in detail
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10 Dec 2011, 12:42
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10 Dec 2011, 13:20
I chose B, then I realized it was asking for the one NOT calling into a questions hate it when it happens
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10 Dec 2011, 22:08
ruturajp 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?

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.

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

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.

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

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.

+1 for C...rest all weakens the conclusion
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11 Dec 2011, 07:09
Anyone can help me to clarify why A waken the conclusion???
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11 Dec 2011, 07:35
I will go with B, it says courier vehicles takes approx 80 min and says passeger vehicles are faster than courier vehicles so 80 min should be sufficient for the trip

Plz correct me if i am wrong and also please share the OA?
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11 Dec 2011, 08:00
acdbe2003 wrote:
Anyone can help me to clarify why A waken the conclusion???

option A says that traffic congestion has been increasing from past five years,as the average trip time is 80 it means today it will take more than 80 minutes.This can be understood by following details
Year Time taken( in mnt.)
1 60
2 70
3 80
4 90
5 100
Average time 80 mnt., thus it needs 100 minutes today for the round trip and hence weakens the conclusion
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11 Dec 2011, 08:06
kotela wrote:
I will go with B, it says courier vehicles takes approx 80 min and says passeger vehicles are faster than courier vehicles so 80 min should be sufficient for the trip

Plz correct me if i am wrong and also please share the OA?

The conclusion is that approximately 80 minutes are needed for the round trip...neither less nor more.Option B says that it will take less than 80 minutes and thus weaken the conclusion.
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11 Dec 2011, 12:18
I selected "C" here. The option on questions like these (weaken except) will often have a neutral effect on the conclusion. In saying that the heavy trucks have a lower speed limit, you can't truly assume that the passenger cars will be able to move at a much higher speed. For all we know, the traffic may force everyone to go 35 MPH, versus the posted speed limit. It doesn't weaken his conclusion that the trip should take 80 minutes. It is merely a neutral statement that could contribute to his reasoning.
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12 Dec 2011, 00:07
+1 for C
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15 Dec 2011, 18:39
kotela wrote:
I will go with B, it says courier vehicles takes approx 80 min and says passeger vehicles are faster than courier vehicles so 80 min should be sufficient for the trip

Plz correct me if i am wrong and also please share the OA?

After clear examination i will go with C, but what is the OA?
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15 Dec 2011, 18:50
ruturajp wrote:

I am still confused..please explain it more in detail

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15 Dec 2011, 22:15
+1 C

The average for the company considers the last five years; that's the key to understand this question.
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26 Dec 2011, 11:32
C
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27 Dec 2011, 19:01
+1 C
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02 Jan 2012, 21:48
Nice question. C is the answer. It took me a while to figure that out though.
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Re: For the last five years, the XYZ Courier Company has made [#permalink]

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16 Dec 2013, 18:16
How is it NOT E??? E has absolutely nothing to do with his logic.
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Re: For the last five years, the XYZ Courier Company has made [#permalink]

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21 Jul 2014, 09:22
Scenario is not clear; what this argument is trying to tell? what is the circumstance?
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Re: For the last five years, the XYZ Courier Company has made   [#permalink] 21 Jul 2014, 09:22

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