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      Question

      The average age of 21 children is 30 years. 4 new

      children, whose average age is 15 years, join them. Find the average age of the 25 children.  
      A 26.5 Correct Answer Incorrect Answer
      B 27.6 Correct Answer Incorrect Answer
      C 25.6 Correct Answer Incorrect Answer
      D 24.2 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

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