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## Because the population

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mundasingh123 GMAT Titan
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Sun Jun 12, 2011 6:35 am
Hi Gmat GuruNY
Quote:
In E, implemented in is not parallel with implemented with. Eliminate E.
Hi Mitch , In E we have implemented with a comparable population in an American city
.So, there is an " in an American City "
Quote:
In C, the placement of in a European city next to efficient incorrectly implies that the location of the rail system is why the rail system is efficient. Eliminate C.

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GMATGuruNY GMAT Instructor
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Sun Jun 12, 2011 3:01 pm
vikram4689 wrote:
GMATGuruNY wrote:
The stereo system in your room is bigger than it is in my room.

In the sentence above, the pronoun it is incorrect. One stereo system cannot be in two rooms at the same time.

For this reason, eliminate A and B in the SC above. The pronoun it implies that one rail system can be in two places at once.
Is it because "it" refers to exactly same entity and not a similar/generic entity at another place, Please comment if following sentences are correct.
The stereo system in your room is bigger than the stereo system in my room.
The stereo system in your room is bigger than that in my room.
Yes, the issue is that it refers to the same stereo system, which cannot be in two places at once. Your sentences solve the problem.

Quote:
Quote:
In C, the placement of in a European city next to efficient incorrectly implies that the location of the rail system is why the rail system is efficient. Eliminate C.
Can you please explain how you got this meaning.
A modifier should be as close as possible to what it's modifying.
In C, more efficient in a European city implies that in a European city is an adverb modifying efficient and that its purpose is to describe in what context the rail system will be more efficient.
The intended meaning of the sentence is to describe the location of the rail system. Thus, in a European city should be placed next to rail system: a rail system in a European city.

Another issue:
The sentence needs to tell us the location of there directly after the introductory clause: Because the population there is denser, a commuter rail system in a European city...

mundasingh123 wrote:
Hi Gmat GuruNY
Quote:
In E, implemented in is not parallel with implemented with. Eliminate E.
Hi Mitch , In E we have implemented with a comparable population in an American city
.So, there is an " in an American City "
As I noted above, a modifier should be as close as possible to what it's modifying.
In E, implemented with a comparable population implies that with a comparable population is an adverb describing how the system will be implemented.
A population in an American city implies that in an American city is an adjective describing the location of the population.
Thus, the comparison in E -- implemented in...implemented with -- is not parallel.

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ice_rush GMAT Destroyer!
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Mon Apr 30, 2012 2:07 pm
Hi GMATGuruNY,
Can we use the same reasoning for A and B (The pronoun it implies that one rail system can be in two places at once) to eliminate (E)? ...that is implemented in a European city will usually be five times more efficient than if it is implemented

Thanks.

confuse mind GMAT Destroyer!
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Mon Aug 06, 2012 7:19 pm
Thanks GMATGuruNY.

one last doubt in the same question

C. will usually be five times more efficient in a European city than one serving a comparable population in an American city

D. in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

In D, I see a parallelism issue
railway system in European city
population in American city

Am I wrong?

vikram4689 GMAT Titan
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Wed Aug 08, 2012 11:32 am
confuse mind wrote:
Thanks GMATGuruNY.

one last doubt in the same question

C. will usually be five times more efficient in a European city than one serving a comparable population in an American city

D. in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

In D, I see a parallelism issue
railway system in European city
population in American city

Am I wrong?
you arent wrong but you missed one point. modifier "serving..." underlined below is an essential modifier that cannot be moved anywhere else in sentence. see parallelism marked by different colors
a commuter rail system in a European city will usually be five times more efficient than will a system serving a comparable population in an American city

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