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      Question

      A group of 30 students appeared in a test. The average

      score of 12 students is 62, and that of the rest is 62. What is the average score of the group?
      A 62 Correct Answer Incorrect Answer
      B 63 Correct Answer Incorrect Answer
      C 60 Correct Answer Incorrect Answer
      D 61 Correct Answer Incorrect Answer

      Solution

      Average of 12 students = 62

      Total score of 12 students = 12 Γ— 62 = 744

      Remaining students = 30 - 12 = 18

      Average of 18 students = 62

      Total score of 18 students = 18 Γ— 62 = 1116

      Total score of all 30 students = 744 + 1116 = 1860

      Average score of the group = 1860 Γ· 30 = 62

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