2015 · Q17
16 litres of a mixture contains milk and water in the ratio 5 : 3. If 4 litres of milk is added to this mixture, the ratio of milk to water in the new mixture would be
Elementary MathematicsRatio and Proportion
- A2:1
- B7:3
- C4:3
- D8:3
Explanation
This is a mixture-ratio problem. 16 litres at 5:3 splits into 10 L milk and 6 L water. Adding 4 L of milk (water unchanged) gives 14 L milk and 6 L water, i.e. 14:6 = 7:3. The trap is option (a) 2:1, from adding the 4 litres to the total before splitting the ratio. Hence option (b).