Two years ago, the cost of the raw material used in a : GMAT Critical Reasoning (CR)
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# Two years ago, the cost of the raw material used in a

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Manager
Affiliations: CFA Level 2 Candidate
Joined: 29 Jun 2009
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Kudos [?]: 210 [0], given: 2

Two years ago, the cost of the raw material used in a [#permalink]

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10 Oct 2009, 16:33
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33% (02:53) correct 67% (01:31) wrong based on 15 sessions

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Two years ago, the cost of the raw material used in a particular product doubled after an earthquake disrupted production in the region where the material is mined. Since that time, the company that makes the product has seen its profit margins decline steadily. Aiming to improve profit margins, the company's head of engineering has decided that he must find a new source for the raw material.

Which of the following, if true, would cast the most doubt on the validity of the head of engineering's decision?

A. New competitors have entered the market every six months for the past two years, resulting in price wars that have progressively driven down revenues across the market.
B. Although the earthquake occurred two years ago, the region's mines have still not recovered to pre-earthquake production capacity.
C. There are several other regions in the world where the raw material is mined, but those regions do not produce as much of the raw material as the current source region.
D. The company could use a completely different raw material to make its product.
E. Recent advances in mining technology will make mining the raw material much more efficient and cost-effective in the future.

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Director
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Re: Head Engineer [#permalink]

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10 Oct 2009, 19:30
A for me.

Although A does not mention anything about raw-material it says that revenues are declining due to price wars. So even if a cheap source is found, the profitability will not increase, it can only remain constant or decrease.
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Re: Head Engineer [#permalink]

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11 Oct 2009, 05:31
Answer should be C. If cost of the raw material is reduced, then the profit of the company will increase. When company shifts its mining place,a lot of additional cost is involved. Moreover, if the new location does not produce as much of the raw material as the current source region, then it casts doubt on the validity of the head of engineering's decision.
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Re: Head Engineer [#permalink]

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11 Oct 2009, 05:41
IMO C.

whats the OA?
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Director
Joined: 01 Apr 2008
Posts: 897
Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014
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Kudos [?]: 645 [0], given: 18

Re: Head Engineer [#permalink]

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11 Oct 2009, 06:24
I just googled it...following post gives a nice explanation...ans is A.
raw-material-80199.html#p602384
Manager
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Re: Head Engineer [#permalink]

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11 Oct 2009, 13:45
As the Economist indicates

OA is A
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Re: Head Engineer [#permalink]

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11 Oct 2009, 18:42
The underlying assumption in this passage is that mining cost is the primary factor which has brought down the profit margin.

Only option A is negating this assumption.

Hence A should be the answer.
Re: Head Engineer   [#permalink] 11 Oct 2009, 18:42
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# Two years ago, the cost of the raw material used in a

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