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      Question

      If the average cost price of 25 identical shirts decreases

      by Rs. 5 after replacing one shirt with a new shirt that costs Rs. 100, what was the original cost price of the replaced shirt?
      A Rs.170 Correct Answer Incorrect Answer
      B Rs.225 Correct Answer Incorrect Answer
      C Rs.120 Correct Answer Incorrect Answer
      D Rs.105 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ;

      Let the cost price of each shirt be Rs. 'x'.

      So, cost price of 25 shirts = Rs. 25x

      ATQ:

      (25x - x + 100) ÷ 25 = x - 5

      Or, 24x + 100 = 25x - 125

      Or, x = 225

      So, the cost price of the shirt that was removed is Rs. 225.

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