### A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?

A. $\large\frac{1}{3}$ B. $\large\frac{1}{4}$ C. $\large\frac{1}{5}$ D. $\large\frac{ 1}{7}$ Answer: Option C

A. 81 liters
B. 71 liters
C. 56 liters
D. 50 liters