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      Question

      Three types of wheats costing Rs. 60/kg, Rs. 80/kg and

      Rs. 100/kg are mixed in the ratio of 3:2:1 respectively. Find the average cost of wheat per kg. Answer should be round off up to nearest integer.
      A Rs. 74/kg Correct Answer Incorrect Answer
      B Rs. 75/kg Correct Answer Incorrect Answer
      C Rs. 73/kg Correct Answer Incorrect Answer
      D Rs. 72/kg Correct Answer Incorrect Answer

      Solution

      Let the quantities of wheat costing Rs. 60/kg, Rs. 80/kg and Rs. 100/kg be '3p' kg, '2p' kg and 'p' kg, respectively. So, average cost of wheat per kg = {(60 X 3p) + (80 X 2p) + (100 X p) } ÷ (3p + 2p + p) = (180p + 160p + 100p) ÷ (6p) = (440/6) ~ Rs. 73/kg

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