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After the national speed limit of 55 miles per hour was

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Senior Manager
Joined: 19 Feb 2004
Posts: 413

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Location: Lungi
After the national speed limit of 55 miles per hour was [#permalink]

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01 Apr 2004, 08:22
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After the national speed limit of 55 miles per hour was imposed in
1974, the number of deaths per mile driven on a highway fell abruptly
as a result. Since then, however, the average speed of vehicles on
highways has risen, but the number of deaths per mile driven on a
highway has continued to fall.

Which of the following conclusions can be properly drawn from the
statements above?
(A) The speed limit alone is probably not responsible for the
continued reduction in highway deaths in the years after 1974.
(B) People have been driving less since 1974.
(C) Driver-education courses have been more effective since 1974 in
teaching drivers to drive safely.
(D) In recent years highway patrols have been less effective in
catching drivers who speed.
(E) The change in the speed limit cannot be responsible for the
abrupt decline in highway deaths in 1974.

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Manager
Joined: 27 Feb 2004
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Location: illinois

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01 Apr 2004, 15:54
A..Close choice between A and E...

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Manager
Joined: 03 Sep 2005
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15 Sep 2005, 15:37
Can someone explain why this cannot be E?
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Life is not measured by the number of breaths you take, but by the number of moments that take your breath away.

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Senior Manager
Joined: 29 Nov 2004
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Location: Chicago

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15 Sep 2005, 15:59
trulyblessed wrote:
Can someone explain why this cannot be E?

It is very strong and cannot be proved from the statement catergorically.
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Fear Mediocrity, Respect Ignorance

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Director
Joined: 23 Jun 2005
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GMAT 1: 740 Q48 V42

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15 Sep 2005, 16:07
trulyblessed wrote:
Can someone explain why this cannot be E?

In addn to Ranga's answer, if you read the question, it clearly states the number of deaths fell "as a result"of reduction of the speed limit. So, E claims a fact contradictory to the statement.
Anand

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15 Sep 2005, 16:07
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After the national speed limit of 55 miles per hour was

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