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Source: — Problem Solving |
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by louvre » Tue Jul 15, 2008 6:43 am
Answer "D"?
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Re: percent

by parallel_chase » Tue Jul 15, 2008 7:36 am
gxliu wrote:This is is kind of hard too
Answer is B

From the question we can conclude following:

1993

1000 cameras

1994

1000 + 1000 *x/100 => 1000+10x cameras

1995

1000 + 10x + (1000+10x)*y/100 => 1000+10x+10y+xy/10

=> 1000 + 10 (x + y+ xy/100)

Therefore we just need to find the values of x and y to determine the produce for 1995.

Statement I - xy =20 it does not tell us about the individual percent increases of 1994 and 1995. Therefore NOT SUFFICIENT.

Statement II - X + Y + XY/100 = 9.2

Statement II does not gives the individual values but it gives us the value for the entire equation..


1000 + 10 (9.2) = 1000 + 92=> 1092


Hence B.

Let me know if you have any doubts in understanding the steps.
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by sudhir3127 » Tue Jul 15, 2008 8:49 am
Answer B.
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