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Investigators concluded that human failure was not

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Investigators concluded that human failure was not [#permalink] New post 09 May 2009, 11:42
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75% (01:52) correct 25% (02:02) wrong based on 3 sessions
Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August.
Which one of the following is an assumption underlying the argument in the passage?
(A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems.
(B) Mechanical problems in airplanes have increased dramatically since last August.
(C) Mechanical problems in airplanes have not increased by 50 percent since last August.
(D) Airlines are less reluctant to report mechanical problems than they previously were.
(E) Mechanical problems in airplanes have become easier to detect since last August.


please explain.
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Re: CR: airplane mechanical problems [#permalink] New post 09 May 2009, 17:07
IMO C

Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August.
Which one of the following is an assumption underlying the argument in the passage?
(A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems --> this is not about the result of increase mechanical reports, but about the cause of them
(B) Mechanical problems in airplanes have increased dramatically since last August -->weaken. More mechanical problems-->more reports (not because of more rules)
(C) Mechanical problems in airplanes have not increased by 50 percent since last August -->negating this: Mechanical problems in airplanes have increased by 50 percent since last August -->weaken like (B). So, the best
(D) Airlines are less reluctant to report mechanical problems than they previously were -->weaken. Because airlines are now likely to report mechanical problems than they were before, this accounts for the fact that mechanical reports increase (not because of more rules)
(E) Mechanical problems in airplanes have become easier to detect since last August -->another weaken. Analyzing like (B) & (D)
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Re: CR: airplane mechanical problems [#permalink] New post 09 May 2009, 18:16
Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August.
Which one of the following is an assumption underlying the argument in the passage?
(A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems.
(B) Mechanical problems in airplanes have increased dramatically since last August.
(C) Mechanical problems in airplanes have not increased by 50 percent since last August.
(D) Airlines are less reluctant to report mechanical problems than they previously were.
(E) Mechanical problems in airplanes have become easier to detect since last August.

Anwser: C
It says "Mechanical problems in airplanes have not increased by 50 percent since last August."..The conclusion is the reports were increased by 50% which means already existing problems were reported rather than new problems.
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Re: CR: airplane mechanical problems [#permalink] New post 08 Jun 2009, 11:53
I'm with C as well.
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Re: CR: airplane mechanical problems [#permalink] New post 14 Jun 2009, 11:43
Its C for me...If the reason is not human error then it should be mechanical problem...To make it true, the amount of mechanical problems today should not be much more than that present earlier...C brings it out clearly...
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Re: CR: airplane mechanical problems [#permalink] New post 14 Jun 2009, 11:52
Agree with C
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Re: CR: airplane mechanical problems [#permalink] New post 06 May 2010, 15:00
C seems to be right
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Re: CR: airplane mechanical problems [#permalink] New post 06 May 2010, 15:21
IMO it should be D..Pls post the OA..
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Re: CR: airplane mechanical problems [#permalink] New post 06 May 2010, 15:29
IEsailor wrote:
IMO it should be D..Pls post the OA..


Its C only,

D states that now airline are more eager to report => increase in the reports is because of their eagerness not because of the rules.
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Re: CR: airplane mechanical problems   [#permalink] 06 May 2010, 15:29
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