Task: Question Answering
Input (English): Problem: a certain debt will be paid in 65 installments from january 1 to december 31 of a certain year. each of the first 20 payments is to be $ 410; each of the remaining payments is to be $ 65 more than each of the first 20 payments. what is the average ( arithmetic mean ) payment that will be made on the debt for the year ?
Options: a. 443, b. 455, c. 465, d. 468, e. 475
Output (English): b