Task: Question Answering
Input (English): Problem: last year department store x had a sales total for december that was 6 times the average ( arithmetic mean ) of the monthly sales totals for january through november. the sales total for december was what fraction of the sales total for the year ?
Options: a. 6 / 17, b. 4 / 15, c. 1 / 3, d. 4 / 11, e. 4 / 5
Output (English): a