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In 1986, the city of Los Diablos had 20 days on which air

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Manager
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Joined: 08 Aug 2008
Posts: 229
Re: Good one - CR [#permalink]

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New post 10 Sep 2008, 22:37
A new & far more accurate spectrometer was invented/used in "december" 1988. did we miss that point?
since the smog alerts 1988 was 39(total), all inference we might have been drawing is the same might have been used in 1989 and the count grew lesser.
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Re: Good one - CR [#permalink]

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New post 10 Sep 2008, 23:43
rao_1857 wrote:
Unfortunatley OA is B .... :(

I still feel D is a better choice.

Anybody like to defend OA? and Why B is wrong ?


I think B is a right choice because of the vague language it has used. The "invention of more accurate gas spectrometer" hasn't impacted directly the explanation of air pollution levels. It's scope is too wide as it MAY or MAY NOT have been used by Los Dialos's Pollution Control Board for the purpose. This options says that a new device was INVENTED (not used!) and that's it. It's a tricky option but we have rule out other possibilities BY POE and get to LEAST contributing option, and thus the BEST one.

As far as D is concerned, we should read the question again: "...would be LEAST helpful in explaining the air pollution levels...". Something was done by mayor in 1988 that may elevate the air pollution severity. Though in 1989 something opposite happened, still this option has to be weighed and taken into consideration because here we have to "explain the reasons for air pollution levels. It's like, "If, in 1989, the number of smog alerts in Los Diablos dropped to sixteen, then how the action of the mayor affected this outcome?" If mayor had not done what he did, then maybe the pollution level would have been much less than sixteen." Thus D cannot be ignored.
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Re: Good one - CR [#permalink]

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New post 11 Sep 2008, 01:59
rao_1857 wrote:
Unfortunatley OA is B .... :(

I still feel D is a better choice.

Anybody like to defend OA? and Why B is wrong ?


My view changes after looking at the OA :(

After reading B again and again, what I find is that it mentions that a new spectrometer was invented. It does not say that this new spectrometer was used for measurement. It would have been invented and kept in the laboratory.
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Re: Good one - CR [#permalink]

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New post 11 Sep 2008, 10:31
rao_1857 wrote:
Unfortunatley OA is B .... :(

I still feel D is a better choice.

Anybody like to defend OA? and Why B is wrong ?


Is it because B uses the word "invented" and not "used".....new and more accurate spectrometer was invented...but what if it was not used?
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Re: Good one - CR [#permalink]

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New post 11 Sep 2008, 10:47
I still can't believe it's B. D is by far more convincing.

source of question?
Re: Good one - CR   [#permalink] 11 Sep 2008, 10:47

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In 1986, the city of Los Diablos had 20 days on which air

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