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      Question

      The average cost price of 15 pens (having equal cost

      price) decreased by Rs.3, when one of the pen is replaced by a new pen having cost price of Rs.50. Find the cost price of the pen that was replaced.
      A Rs.120 Correct Answer Incorrect Answer
      B Rs.95 Correct Answer Incorrect Answer
      C Rs.160 Correct Answer Incorrect Answer
      D Rs.104 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let the cost price of each pen be Rs.x So, cost price of 15 pens = Rs.15x According to the question, => (15x тАУ x + 50)/15 = x тАУ 3 => 14x + 50 = 15x тАУ 45 => x = 95 Therefore, the cost price of the pen that was replaced is = Rs.95

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