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Compared to those!

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Compared to those!

by gmat_perfect » Thu Jul 15, 2010 12:37 pm
Compared to those who do not, running three days a week saves an average of 14.1 percent on health-care costs each year in the United States.

(A) Compared to those who do not, running three days a week saves
(B) Compared with nonrunners, people who run three days a week save
(C) Compared to not running, those running for three days a week save
(D) When compared with those who do not, people running three days a week save
(E) When compared to nonrunners, running three days a week saves

[spoiler]OA: B[/spoiler]

is there any short cut to attack this type of sc?
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by fitzgerald23 » Thu Jul 15, 2010 1:51 pm
I believe you can quickly eliminate D & E because "when" should only be used for time or a specific event.

Eliminate A as those does not really refer to anything. In addition the comparison is wrong. "running...saves...compared to those who do not". Do not what? run? save?

Eliminate C for an incorrect comparison. "Those running save costs...compared to not running". Those is also ambiguous. Who or what is running.

B has the correct comparison as it compares two sets of people- "nonrunners" and "people who run"
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by fukushima.ryan » Thu Jul 15, 2010 3:04 pm
I agree. D and E can be eliminated first since "when" is wrong.

The next thing I looked for were modifier issues since the original had "Compared to those who do not run, ...."

A - modifier is not describing "running"
C - modifer does not describe "those"

B is the only choice that has a phrase describing a noun ("people")
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by crackerman » Tue Jul 20, 2010 8:04 pm
Correct one B.
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by uwhusky » Tue Jul 20, 2010 9:26 pm
This information may be beyond what is needed for GMAT, but one way you can look at gerunds is looking at them as noun phrases.

In answer A "running three days a week" is simply a noun phrase, thus cannot be compared to "those who do not", which presents people.

I think C can potentially be correct if "those" is deleted:

Compared to not running, those running for three days a week save
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