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    5. In a group of 3 numbers, the 1st is double of 2nd and half of third. If the average of the three num

    Question

    In a group of 3 numbers, the 1st is double of 2nd

    and half of third. If the average of the three numbers is 56 then find the difference between the third and first number.
    A 48 Correct Answer Incorrect Answer
    B 43 Correct Answer Incorrect Answer
    C 45 Correct Answer Incorrect Answer
    D 40 Correct Answer Incorrect Answer

    Solution

    Let 2nd number be x , 1st number be 2x & 3rd number be 4x, So (2x+x+4x)/3 = 24 or 7x/3 = 56 or x = 24 1st number = 2x = 48 3rd number = 4x = 96 Difference = 96 - 48=48.

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    Relevant for Exams:

    • SSC CHSL

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