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    Question

    If the mean proportion of 4.8 and 1.2 is 'k', then find

    the value of '6k'.
    A 12.4 Correct Answer Incorrect Answer
    B 14.4 Correct Answer Incorrect Answer
    C 18.6 Correct Answer Incorrect Answer
    D 16.6 Correct Answer Incorrect Answer

    Solution

    Mean proportion of two numbers 'a' and 'b' = √ab

    So, 'k' = √(4.8 X 1.2) = √5.76 = 2.4

    Required value = 6 X 2.4 = 14.4

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