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

    Question

    A 840 ml mixture contains milk and water in the ratio 7:5.

    If ‘x’ ml each of milk and water is poured into it, the new ratio of milk to water becomes 6:5. What is x?
    A 252 Correct Answer Incorrect Answer
    B 350 Correct Answer Incorrect Answer
    C 362 Correct Answer Incorrect Answer
    D 342 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Milk = (7/12) × 840 = 490 ml

    Water = 840 – 490 = 350 ml

    ATQ:

    (490 + x)/(350 + x) = 6/5

    ⇒ 5(490 + x) = 6(350 + x)

    ⇒ 2450 + 5x = 2100 + 6x

    ⇒ x = 350

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