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    • Question

      The average of ‘x’ numbers is 18. If 40% of the numbers

      are decreased by 4 and the remaining numbers are increased by 6, then find the new average of the ‘x’ numbers.
      A 31.9 Correct Answer Incorrect Answer
      B 44.5 Correct Answer Incorrect Answer
      C 22.5 Correct Answer Incorrect Answer
      D 19.6 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Sum of ‘x’ numbers = 18x

      New sum of the ‘x’ numbers = 18x – 0.4x × 4 + 0.6x × 6 = 19.6x

      Therefore, new average = 19.6x/x = 19.6

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