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The postal service is badly mismanaged. Forty years ago,

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Director
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 [#permalink] New post 11 May 2005, 08:41
Could someone please answer my question please. Pretty please.
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 [#permalink] New post 14 May 2005, 10:52
Bumping up this thread. Could someone who knows why AC D is wrong please answer. See my last post for details.
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 [#permalink] New post 14 May 2005, 14:11
If it took longer in the past to deliver a letter, then it means they have a right to charge more now, when they deliver mail faster.
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 [#permalink] New post 14 May 2005, 23:19
Tricky question,

A mitigates mismanagement probllem - weakener
B same
C same (one objection how do we know that other services aren't mismanaged even worse? )
D same (letters are delivered faster -> better management)
E strengthener - mail should cost now 9c instead of 30c - > ineffiicient management
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Re: CR GMAT LAST 4 [#permalink] New post 19 May 2005, 21:57
gmataquaguy wrote:
HongHu wrote:
Fact: The price has increased. The speed and reliability of service has decreased.
Conclusion: It is mismanaged.

Ask for NOT weakening.

(A) The volume of mail handled by the postal service has increased dramatically over the last forty years.
Increase in volume provide another reason why it is more expensive and slower to get mail, other than mismanagement. Weakens.

(B) Unprecedented increases in the cost of fuel for trucks and planes have put severe upward pressures on postal delivery costs.
Increase in cost offers alternative explaination about why the price is higher. Weakens.

(C) Private delivery services usually charge more than does the postal service for comparable delivery charges.
It says nothing why postal service is worse today then before. NOT weaken.

(D) The average delivery time for a first-class letter four decades ago was actually slightly longer than it is today.
It rebuts the facts upon which the conclusion based, and thus weakens the conclusion.

(E) The average level of consumer prices overall has increased more than 300 percent over the last forty years.
Offers alternative explanation of increase in price other than mismanagement. Weakens.

Therefore C.


HongHu,
The OA is E. This makes sense coz 300% = 3 fold but the postal service costs went up by 10 fold.

But now the question is why does C, D not weaken the argument. I see why/how C weakens the argument [see my explanation].

But why is D wrong. To weaken a conclusion, one shouldnt "refute" the premise upon which the argument is based. You bring outside information that weakens the author's assumption.

Can someone explain why "D" weakens the conclusion. I dont see how.


Hmmm I disagree with the OA. Sure 3 fold is not 10 fold but it offers a partial explanation. It doesn't totally overturns the argument, but weakens it. (If 3 fold doesn't weaken, will 5 fold weaken it? 8 fold? Where is this magic point? I'd say as long as the overall price increases it weakens the argument to a certain degree.)

D also weakens the argument about mismanagement because it weakens one of the fact that the argument relies upon.
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Re: CR GMAT LAST 4   [#permalink] 19 May 2005, 21:57
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