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      Question

      The average of the first four numbers is 'x+30', the

      average of the next 10 numbers is 'x', and the average of the remaining 6 numbers is 'x−20'. If the average of all the numbers is 50, find the value of 'x'.
      A 45 Correct Answer Incorrect Answer
      B 40 Correct Answer Incorrect Answer
      C 50 Correct Answer Incorrect Answer
      D 55 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, 4(x+30)+10x+6(x−20)=50×20 4x+120+10x+6x−120=1000 20x=1000 x=50

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