Question
The average cost of 4 chairs is Rs. 11000. The average
cost decrease by 15% when one more chair is included. What is the cost price of the 5th chair?Solution
Total cost of 4 chairs = 11000 × 4 = Rs. 44000 Average cost of all the 5 chairs = 11000 × (85/100) = Rs. 9350 Total cost of all the 5 chairs = 9350 × 5 = Rs. 46750 Cost of the 5th chair = 46750 - 44000 = Rs. 2750
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