If two qualities of wheat costing Rs. 36/kg and Rs. 45/kg respectively are mixed. The selling price of the mixture is Rs. 50.4/kg which is 20% more than the cost price of the mixture. Find the ratio in which the two qualities of wheat are mixed.
1
2 : 1
2
6 : 3
3
1 : 1
4
1 : 2
5
3 : 2