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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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