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A mixture containing 63% of oil is mixed with another mixture containing 89% oil in the ratio 1 : 11. Find the percentage of oil in the mixture formed.

A mixture containing 63% of oil is mixed with another mixture containing 89% oil in the ratio 1 : 11. Find the percentage of oil in the mixture formed. Correct Answer 87%

The mixture is mixed in a ratio 1 : 11. Let the quantities of mixtures mixed be 100 and 1100 litres, respectively. The amount of oil in the mixture formed = 100 * 63 / 100 + 1100 * 89 / 100 = 63 + 979 = 1042 litres The percentage of oil in the mixture so formed = 1042 / 1200 * 100 = 86.83% ≈ 87%

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