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.

[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