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    Question

    A man purchases cold-drink for three consecutive years.

    In the first year, he purchases cold-drink at the rate of ₹ 8.00 per litre, in the second year, at the rate of ₹ 12.00 per litre and in the third year, at ₹ 16.00 per litre. If he purchases cold-drink worth ₹ 2,400 each year, the average price of cold-drink per litre for the three years is:
    A ₹ 6.77 Correct Answer Incorrect Answer
    B ₹ 12.93 Correct Answer Incorrect Answer
    C 11.07 Correct Answer Incorrect Answer
    D ₹ 7.18 Correct Answer Incorrect Answer
    E ₹ 10.90 Correct Answer Incorrect Answer

    Solution

    Price of cold-drink in first year = ₹ 8.00 per litre.
    ∴ Quantity of cold-drink in first year = 2400/8.00 = 300 litres
    Price of cold-drink in second year = ₹ 12.00 per litre.
    ∴ Quantity of cold-drink in second year = 2400/12.00 = 200 litres
    Price of cold-drink in third year = ₹ 16.00 per litre.
    ∴ Quantity of cold-drink in third year = 2400/16.00 = 150 litres
    ∴ Required average = (3 × 2400)/ (300 + 200 + 150) = 7200/650 = ₹ 11.07

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