GMAT Quantitative Reasoning Practice Test 2

Question : 5 of 100

Marks: +1, -0

One gallon of soft drink is made of

40 \%

orange juice and

60 \%

water, how many additional gallons of orange juice must be mixed in to make the orange juice

60 \%

of the soft drink?

Solution:

Use the average formula to solve the following equation:

\;\;{1 × 40 \%+X × 100 \%}/{1+X}=60 \% .

\;X=0.5 \;\text " gallon. "\;

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