IBPS RRB Officer Scale 1 Model Paper 9

Four glasses of sizes 3 litres, 4 litres, 6 litres and 7 litres contain mixture of milk and water in the ratio2 : 1, 5 : 3, 6 : 3 and 9 : 5 respectively. Find the ratio milk to water if the contents of all the fourglasses are poured into one large vessel.