A grocer buys two kind of rice at Rs. 1·80 and Rs. 1·20

A grocer buys two kind of rice at Rs. 1·80 and Rs. 1·20 per kg respectively. In what proportion should these be mixed, so that by selling the mixture at Rs. 1·75 per kg, 25 % may be gained ?

Given that :- S.P. of 1 kg mixture = Rs. 1·75, Gain = 25%

∴ Mean price = Rs.		1·75 × 100
		125

Mean price = Rs. 1·40
∴ (Dearer rice) : (Cheaper rice) = 20 : 40
Hence , (Dearer rice) : (Cheaper rice) = 1 : 2.