Question

A mixture (oil + kerosene) contains oil and kerosene in the ratio of 6:5, respectively. If 55 litres of the mixture is replaced with 25 litres of kerosene, then quantity of oil in the final mixture becomes 20 litres more than that of kerosene. Find the initial quantity of the mixture.

A 121 litres
B 165 litres
C 187 litres
D 220 litres
E None of these
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