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    Question

    If X:Y = 7:3 and Y:Z = 9:4, then find the value of

    (X:Y:Z).
    A 21:9:4 Correct Answer Incorrect Answer
    B 9:4:21 Correct Answer Incorrect Answer
    C 21:9:4 Correct Answer Incorrect Answer
    D 3:9:4 Correct Answer Incorrect Answer

    Solution

    Let value of 'Y' and 'Z' be 9a and 4a respectively.
    So, 'X' = 9a X (7/3) = 21a
    So, required ratio = 21a:9a:4a = 21:9:4

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