Task: Question Answering
Input (English): Problem: if a mixture is 2 ⁄ 7 alcohol by volume and 3 ⁄ 7 water by volume, what is the ratio of the volume of alcohol to the volume of water in this mixture ?
Options: a. 3, b. 1 / 3, c. 2 / 3, d. 3 / 5, e. 4 / 5
Output (English): c