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Option 3 : Statement I and Statement II together are sufficient to answer the question.
Statement I and II:
Suppose the quantities of petrol and kerosene oil are ‘x’ and ‘y’ litres;
∴ 1.2 × (70x + 50y) = 80 × (x + y)
⇒ 84x + 60y = 80x + 80y
⇒ 4x = 20y
⇒ x : y = 5 : 1
∴ Ratio of petrol and kerosene oil in the mixture = 5 : 1
Statement III is not required to get the answer.
∴ Statement I and Statement II together are sufficient to answer the question
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