In what proportion should rice priced at Rs. 7.20 per kg be combined with rice costing Rs. 5.70 per kg to obtain a mixture valued at Rs. 6.30 per kg?

Explanation

To find the mixing ratio, use the allegation method: The difference between the cost of the higher-priced rice and the mixture is 7.20 - 6.30 = 0.90, and the difference between the mixture and the lower-priced rice is 6.30 - 5.70 = 0.60. The ratio is therefore 0.60 : 0.90 or 2 : 3.