New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Milk becomes 15% costlier. Find the percentage decrease

    in usage to maintain the same expenditure.Round to the nearest whole number.
    A 13 % Correct Answer Incorrect Answer
    B 30 % Correct Answer Incorrect Answer
    C 17 % Correct Answer Incorrect Answer
    D 29 % Correct Answer Incorrect Answer

    Solution

    ATQ,

    Initial price = Rs. 100m, consumption = n

    Initial expenditure = 100mn

    New price = 115m

    New consumption = 100mn ÷ 115m = 100n ÷ 115

    Decrease = n - (100n ÷ 115) = 15n ÷ 115

    Required percent = (15n ÷ 115) ÷ n × 100 = 1500 ÷ 115 ≈ 13%

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