Task: Question Answering
Input (English): Problem: exactly 3 / 7 of the people in the room are under the age of 21, and exactly 5 / 10 of the people in the room are over the age of 65. if the total number of the people in the room is greater than 50 and less than 100, how many people in the room are under the age of 21 ?
Options: a. 21, b. 35, c. 39, d. 30, e. 65
Output (English): d