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Conclusion CR

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Manager
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Joined: 13 Aug 2009
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WE 1: 4 years in IT
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Kudos [?]: 24 [0], given: 7

Conclusion CR [#permalink] New post 29 Mar 2010, 09:59
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

81% (02:05) correct 19% (01:31) wrong based on 26 sessions
[Reveal] Spoiler:
OA--A

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Manager
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Re: Conclusion CR [#permalink] New post 29 Mar 2010, 11:53
It is clearly A.
Senior Manager
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Re: Conclusion CR [#permalink] New post 06 Apr 2010, 04:43
I appreciate that the posting is tagged with "GMAT Prep."
I appreciate the discussion, but do not feel good when a previously seen question appears on the GMAT Prep test. It inflates the score, and gives a wrong sense of accomplishment. Though if some of these happen to appear on the real test, that'd be great :D

Thanks for tagging. If possible please tag all the questions as best as you can. It helps in so many ways.
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Re: Conclusion CR [#permalink] New post 22 Jun 2010, 11:02
Yes, Idien is right. OA is A. I got this question correct on the test1.

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Manager
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Re: Conclusion CR [#permalink] New post 19 Nov 2011, 05:33
Output/miner (x) = Total coal(T) / number of miners (n)

i.e. x = T/n;

Premise tells new value of x (x') = 2x
A tells n remains unchanged.

So let the new total output = T'

so putting in the equation :

2x = T'/n or T' = 2xn or

T' = 2T ..... this is what A says ...

Hence correct answer is A

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Re: Conclusion CR [#permalink] New post 26 Apr 2012, 23:48
That the application of new technology can increase the productivity of existing coal mines is demonstrated by the case of Tribnia’s coal industry. Coal output per miner in Tribnia is double what it was five years ago, even though no new mines have opened. Which of the following can be properly concluded from the statement about coal output per miner in the passage?
A. If the number of miners working in Tribnian coal mines has remained constant in the past five years, Tribnia’s total coal production has doubled in that period of time.
B. Any individual Tribnian coal mine that achieved an increase in overall output in the past five years has also experienced an increase in output per miner.
C. If any new coal mines had opened in Tribnia in the past five years, then the increase in output per miner would have been even greater than it actually was.
D. If any individual Tribnian coal mine has not increased its output per miner in the past five years, then that mine’s overall output has declined or remained constant.
E. In Tribnia the cost of producing a given quantity of coal has declined over the past five years.


This question comes in must be true so we must be able to point out and show that the option is clearly implied in the given passage

first understand the given passage as it states that the new technology increases coal productivity without opening new coal mines.doubling the production.

we can make following assumptions
1. the working capacity or ability of workers have increased so that more coal can be produced
2. the new technology made the work easy so that they(workers) can complete the work more faster and produce more coal
3.the workers have increased and coal production increased ...
like that we can make so many assumptions

1.statement 1 states that the no of workers did not increased in past 5 years and with not opening any new coal mines the production doubled ,that means the technology helped to work more faster and efficiently to double their production we cannot make any assumptions here we should accept the given statement so we have to consider this statement indirectly which is given in passage.
2.increase in individual production leads to overall increase so as the given passage did not state that so we can eliminate that(please keep in mind that we should take the info only from the given not our assumptions)
3.the passage is stating as not opening any new mines but statement is stating that opening new mines which is opposite to the passage so eliminate.
4. no increase in individual production can lead to constant or decrease in production so this is out of scope as the passage did not state about individual production.so eliminate it.
5. statement 5 is stating of cost of production which is not mentioned in passage so eliminate this .

so only option A states indirectly as given in passage exactly.
Re: Conclusion CR   [#permalink] 26 Apr 2012, 23:48
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