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    Question

    The average cost of 5 chairs is Rs. 12000. The average

    cost decrease by 12% when one more chair is included. What is the cost price of the 6th chair?
    A Rs.3500 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 5 chairs = 12000 × 5 = Rs. 60000 Average cost of all the 6 chairs = 12000 × (88/100) = Rs. 10560 Total cost of all the 6 chairs = 10560 × 6 = Rs. 63360 Cost of the 6th chair = 63360 - 60000 = Rs. 3360

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