Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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?

### Accurate SQL ###

SELECT AVG(races) FROM table_name_98 WHERE final_placing = "15th" AND season = "2005"