Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_98 (races INTEGER, final_placing VARCHAR, season VARCHAR)
### Question:
In the 2005 season, how many races did the 15th place team complete?
### Answer:
SELECT AVG(races) FROM table_name_98 WHERE final_placing = "15th" AND season = "2005"