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    Question

    The average cost of 3 chairs is Rs. 9500. The average

    cost decrease by 15% when one more chair is included. What is the cost price of the 4th chair?
    A Rs.3600 Correct Answer Incorrect Answer
    B Rs.3360 Correct Answer Incorrect Answer
    C Rs.3800 Correct Answer Incorrect Answer
    D Rs.3200 Correct Answer Incorrect Answer

    Solution

    Total cost of 3 chairs = 9500×3 = Rs. 28500 Average cost of all the 4 chairs = 9500×(85/100) = Rs. 8075 Total cost of all the 4 chairs = 8075 ×4 = Rs. 32300 Cost of the 4thchair = 32300 - 28500 = Rs. 3800

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