Task: Question Answering
Input (English): Problem: the average age of 20 students of a class is 20 years. out of these, the average age of 9 students is 11 years and that of the other 10 students is 24 years. the age of the 20 th student is ?
Options: a. 65, b. 61, c. 59, d. 63, e. 64
Output (English): b