The equation to this mixture problem is as follows:
0.1x + 0.02y = 0.05z = 0.05*(x + y)
and we need to find x.
Statement 1: y = 10, therefore the equation can be simplified to:
0.1x + 0.02*(10) = 0.05*(x + 10), x is the only variable and can be solved. Sufficient.
Statement 2: z = 16
z = x + y
y = z - x = 16 - x
the mixture equation can be simplified to:
0.1x + 0.02*(16 - x) = 0.05*(16), x is the only variable and can be solved. Sufficient.
Choose D.
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Gravel
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Source: Beat The GMAT — Data Sufficiency |
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