Source: Manhattan Prep
A mixture of oil, water, and vinegar contains 10% oil. After all the water evaporates, what percent of the mixture is oil?
1) Before the water evaporated, the mixture exactly filled a one liter bottle
2) Before the water evaporated, vinegar accounted for forty percent of the mixture
The OA is B
A mixture of oil, water, and vinegar contains 10% oil. After all the water evaporates, what percent of the...
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Let's take each statement one by one.BTGmoderatorLU wrote: ↑Mon Jul 06, 2020 4:38 amSource: Manhattan Prep
A mixture of oil, water, and vinegar contains 10% oil. After all the water evaporates, what percent of the mixture is oil?
1) Before the water evaporated, the mixture exactly filled a one liter bottle
2) Before the water evaporated, vinegar accounted for forty percent of the mixture
The OA is B
1) Before the water evaporated, the mixture exactly filled a one liter bottle.
=> Amount of oil = 10% of 1 liter = 100 ml.
=> Water + Vinegar = 900 ml.
Since we do not know the amount of water, we cannot answer the question. Insufficient.
2) Before the water evaporated, vinegar accounted for forty percent of the mixture.
=> Amount of oil = 10% of 1 liter = 100 ml.
=> Amount of vinegar = 40% of 1 liter = 400 ml.
=> Amount of water = 50% of 1 liter = 500 ml.
Amount of oil and vinegar = 100 + 400 = 500 ml.
Percent of oil in the mixture = (100/500)*100% = 20%
Correct answer: B
Hope this helps!
-Jay
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