Task: Question Answering
Input (English): Problem: how much water must be added to 64 litres of milk at 1 1 ⁄ 2 litres for 20 so as to have a mixture worth 10 2 ⁄ 3 a litre ?
Options: a. 16 litres, b. 12 litres, c. 15 litres, d. 18 litres, e. none of these
Output (English): a