A bottle contains spirit and water in the ratio 1 : 4 and another identical bottle contains spirit and water in the ratio 4 : 1. In what ratio should the mixtures in the two bottles be mixed to get a new mixture in which the ratio of spirit to water is 1 : 3?
Answer
The correct answer is D: 11 : 1. In bottle 1, spirit fraction = 1/5. In bottle 2, spirit fraction = 4/5.