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Source: — Data Sufficiency |
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by clock60 » Wed Feb 16, 2011 1:13 pm
(0.1x+0,02y)/(x+y)=0,05. after solving
5x=3y, and notice that x+y=z
(1) y=10 then x=6 suff
(2) z=16, x+y=z=16, and 5x=3y, y=5x/3, 5x/3+x=16. 8x=48.x=6 again suff
D seems right
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