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    Question

    The average cost price of 25 pens (having equal cost

    price) decreased by Rs.4, when one of the pen is replaced by a new pen having cost price of Rs.60. 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

    Solution

    Let the cost price of each pen be Rs.x So, cost price of 25 pens = Rs.25x According to the question, => (25x – x + 60)/25 = x – 4 => 24x + 60 = 25x – 100 => x = 160 Therefore, the cost price of the pen that was replaced is = Rs.160

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