Four vessels of equal size are filled with mixtures of milk and water. The percentages of milk in the four vessels are 80%, 75%, 60% and 50% respectively. If all four mixtures are mixed together, what is the ratio of milk to water in the resulting mixture?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 53 : 27
The vessels are of equal size, so the milk percentage of the mixture is the plain average of the four percentages.
Milk \(\displaystyle =\frac{80+75+60+50}{4}=\frac{265}{4}=66.25\%\)
Water \(=100-66.25=33.75\%\)
Milk : water \(=66.25:33.75=265:135=53:27\)
The ratio of milk to water is 53 : 27.