Question
In a General store, the average cost of a Rice bag,
Pulse bag and Sugar bag is Rs.600. The average cost of sugar bag and Pulse bag is Rs.650. What will be the difference between the cost of Sugar and Rice bag if cost of Pulse bag is (2/11) of a cost of Sugar bag.Solution
[Total /no.of items = average.] Let the total cost of Rice bag, Pulse bag and Sugar bag is = 600 x 3 = 1800 Then, Total cost of Sugar bag and Pulse bag is = 650 x 2= 1300 Hence, the Cost of Rice bag is = cost of Rice bag, Pulse bag and Sugar bag - cost of sugar and Pulse bag = 1800-1300 = 500 According to the question, Pulse bag = 2/11 of Sugar bag Pulse bag : Sugar bag = 2:11     .`. (11u +2u = 13u) Where, 1u = 100 Then, 13u= 1300 So, cost of Pulse bag = 2 x 100= 200 Cost of Sugar bag = 11 x 100 = 1100 Difference between Rice bag and Sugar bag = 1100-500 =Rs.600
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