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    Question

    The sum of three numbers is 212. If the ratio of the

    first to the second is 3:5 and that of second to the third is 7:10 then the second number is? 
    A 70 Correct Answer Incorrect Answer
    B 64 Correct Answer Incorrect Answer
    C 45 Correct Answer Incorrect Answer
    D 60 Correct Answer Incorrect Answer
    E 80 Correct Answer Incorrect Answer

    Solution

    Let the three numbers be A, B and C. Now, A:B = 3:5 & B:C = 7:10 A: B: C = 21:35:50 A+B+C = 212 21k + 35k + 50k = 212 106k = 212 k = 2 Second number = B = 35 x 2 = 70

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