Task: Question Answering
Input (English): Problem: a mail handler needs 3 hours to sort the mail. his assistant takes 6 hours to sort the mail. how many hours will it take for both of them working together to sort the mail ?
Options: a. 3, b. 2, c. 1, d. 2 1 / 2, e. 1 1 / 5
Output (English): b