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Source: — Data Sufficiency |
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by Night reader » Mon Jan 10, 2011 3:58 pm
GHong14 wrote:Image
{m,r,x,y} > 0
Is m/r=x/y OR my=xr ?

st(1) m/y=x/r, mr=xy OR m/y=x/r Not Sufficient
st(2) (m+x)/(r+y) = x/y OR y(m+x)=x(r+y), my+xy=xr + xy [cancel xy here], my=xr Sufficient

answer B
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