Two types of wheat costing 20 Rs/kg and 8 Rs/kg respectively should be mixed in what ratio, so that the resultant mixture will cost 12 Rs/kg, after selling it at a loss of 25%.

2 : 1

25% = \(\frac{1}{4}\), loss (25%) = \(\frac{3}{4}\) (where 3 →S.P and 4 → C.P.)

3R → 12 (given)

1R = 4

4R → 16 (C.P. of Mixture)

Therefore, using alligation method on C.P.

Type 1                   Type 2

Required ration will be = 2 : 1