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?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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