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      Question

      The average age of (x + 4) players in a team is 18

      years. If a 38 years old coach joins the team, the average increases by 1 year. Find x% of 500.
      A 80 Correct Answer Incorrect Answer
      B 75 Correct Answer Incorrect Answer
      C 90 Correct Answer Incorrect Answer
      D 100 Correct Answer Incorrect Answer

      Solution

      Total age of players = 18(x + 4)
      According to question,
      [18(x + 4) + 38] = (18 + 1)(x + 4 + 1)
      18x + 72 + 38 = 19x + 95
      19x - 18x = 110 - 95
      x = 15
      So, 15% of 500 = 75

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