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GMAT PREP POPULATION ??

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Source: — Data Sufficiency |
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answer

by rivers96 » Fri May 02, 2008 3:25 pm
number 1) tells nothing about increase

nuber 2) figure this:

1980= 1,2 1970

1990= 1,3 1970

so;

1990 = 1,3/1,2 1980 thats the answer

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by rosh26 » Sun Sep 07, 2008 12:28 pm
I think the answer would be (1.3-1.2)/1.3 * 100

Is that correct?
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Answer

by gmat_nov_2008 » Sun Sep 07, 2008 7:31 pm
The answer should be B.

(1) is not sufficient.
(2)
Let 100 be population in 1970.
Then 120 in 1980
and 130 in 1990

%age increase can be calculated from (2) alone.
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by rosh26 » Mon Sep 08, 2008 5:08 pm
I know this is not necessary, but what IS the actual pop. increase?
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by sumithshah » Mon Sep 08, 2008 9:42 pm
100/12%
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