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Source: Beat The GMAT — Problem Solving |
Answer is Bgxliu wrote:This is is kind of hard too
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.
