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10 Mar 2011, 09:15
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
50% (02:18) correct
50%
(02:26)
wrong
based on 1889
sessions
History
Date
Time
Result
Not Attempted Yet
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.
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.
10 Mar 2011, 09:48
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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!!!
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!!!
17 Jul 2011, 11:52
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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"
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"
, some one please please help what is the conclusion and how
, some one please please help what is the conclusion and how
