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.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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