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    Question

    A 330 gm mixture contains two components 'P' and 'Q' such

    that the quantity of 'P' is 20% more than that of 'Q'. After adding 'K' gm of 'P', the ratio of 'P' to 'Q' becomes 4:3. Find K% of the final mixture weight.
    A 65 gm Correct Answer Incorrect Answer
    B 88 gm Correct Answer Incorrect Answer
    C 25 gm Correct Answer Incorrect Answer
    D 70 gm Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let quantity of 'Q' = 15y

    Then quantity of 'P' = (6/5) Ă— 15y = 18y

    So total = 15y + 18y = 33y

    33y = 330 ⇒ y = 10

    Initial 'Q' = 15 Ă— 10 = 150 gm

    Initial 'P' = 18 Ă— 10 = 180 gm

    ATQ:

    (180 + K) : 150 = 4 : 3

    Or, 3 Ă— (180 + K) = 4 Ă— 150

    Or, 540 + 3K = 600

    Or, 3K = 60

    Or, K = 20

    Final mixture = 330 + 20 = 350 gm

    Required value = 0.2 Ă— 350 = 70 gm

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