A container mixes 14 L of a 20% juice solution with 19 L of a 40% juice solution. How many litres of pure juice are in the mixture?

A) 52/5 L

B) 109/10 L

C) 99/10 L

D) 57/5 L

Answer: A

Explanation: Pure juice in each part equals its volume multiplied by its concentration.
14 × 0.20 + 19 × 0.40 = 52/5 L of pure juice.