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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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