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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 4th chair = 32300 - 28500 = Rs. 3800

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