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A significant number of complex repair jobs carried out by

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A significant number of complex repair jobs carried out by [#permalink] New post 06 May 2009, 13:17
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A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

The argument above assumes which of the following?

A. There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.
B. There is no company that successfully competes with Ace Repairs for complex repair jobs.
C. Ace Repairs’ warranty is good on first-time jobs but does not cover rework jobs.
D. Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked.
E. There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily.

pleae explain...
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Re: CR - Ace repairs [#permalink] New post 06 May 2009, 14:46
A

rework jobs could be due to lack of competence that an employee may have, not lack of concentration. Another employee may just be better at the job
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Re: CR - Ace repairs [#permalink] New post 06 May 2009, 15:16
I agree its A

Argument clearly says rework is not because the mechanics lack competence
that means there is an assumption that A. There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.
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Re: CR - Ace repairs [#permalink] New post 06 May 2009, 18:57
Yes,clear A.

It reinforces that employee competence is similar for both initial and rework jobs.Thus, employee competence does not contribute to rework.
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Re: CR - Ace repairs [#permalink] New post 28 Oct 2009, 23:12
One more vote for A
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Re: CR - Ace repairs [#permalink] New post 29 Aug 2011, 18:37
a,
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Re: CR - Ace repairs [#permalink] New post 29 Aug 2011, 22:49
+1 A
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Re: A significant number of complex repair jobs carried out by [#permalink] New post 26 Apr 2014, 17:01
Hello from the GMAT Club VerbalBot!

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Re: A significant number of complex repair jobs carried out by [#permalink] New post 01 Jun 2014, 23:24
A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty. The reworked jobs are invariably satisfactory. When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.
Premises:
More complex repair jobs have to be reworked under warranty.
2. Reworked jobs are satisfactory
3.initial repairs are inadequate
Conclusion:
Reworked jobs are done with focused concentration and reliably than first time jobs.

I ended up with Options(C) & (D), but didn't thought about option(A). Can you please explain where I went wrong? Why A is correct? Why C & D are wrong?
c) Warranty is not available for reworked jobs. So, these are done with more concentration.
d) Negation of this makes the conclusion more believable.
Re: A significant number of complex repair jobs carried out by   [#permalink] 01 Jun 2014, 23:24
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