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      Question

      The average of the first 7 non-zero multiples of 18

      is:
      A 42 Correct Answer Incorrect Answer
      B 72 Correct Answer Incorrect Answer
      C 46 Correct Answer Incorrect Answer
      D 27 Correct Answer Incorrect Answer

      Solution

      The sum of 7 multiple of 18 = (18+36+........126) = 18(1+2+......7) = 18(7×8)/2 =18×28 Average = (18×28)/7 =18×4=72

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