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In the 1980's the rate of increase of the minority

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In the 1980's the rate of increase of the minority [#permalink] New post 28 May 2005, 17:49
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A
B
C
D
E

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In the 1980's the rate of increase of the minority population of the united states was nearly twice as fast as the 1970's
A.
B.twice as fast as it was in
C.twice what it was in
D.two times faster than that of
E.two times greater than

Pls explain your answer. :snipersmile:
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 [#permalink] New post 28 May 2005, 20:28
C.

it compares "the rate of increase", so B cannot be right.
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 [#permalink] New post 29 May 2005, 06:29
Quote:
C.

it compares "the rate of increase", so B cannot be right.


I still don't understand your explaination[/quote]
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 [#permalink] New post 29 May 2005, 06:40
We are comparing "rate of increase", two static elements. A rate can be greater than another one but not faster. You can say that X increases faster than Y or that the speed of X is faster than the speed of Y but "rates" do not "move" in any directions. they are static. Hence, A, B and D are out. E is obviously comparing apples and oranges and only C stands out.
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 [#permalink] New post 29 May 2005, 07:54
Paul wrote:
We are comparing "rate of increase", two static elements. A rate can be greater than another one but not faster. You can say that X increases faster than Y or that the speed of X is faster than the speed of Y but "rates" do not "move" in any directions. they are static. Hence, A, B and D are out. E is obviously comparing apples and oranges and only C stands out.


Good one Paul :)

I was wondering if rate of increase can be compared for its fastness !!

DE are out.
AB are out bcoz of the "fastness" comparison.
C is best.
Consider this : Rate of increase = a number
for eg. 1970's = 5%
1980's = 10%

These numbers can be related only numerically not for its fastness.
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ash
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  [#permalink] 29 May 2005, 07:54
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