Table schema:
CREATE TABLE table_name_47 (position INTEGER, a_score VARCHAR, b_score VARCHAR, total VARCHAR)

Question: What was their position when the score of B was less than 9.05, a total was 15.275, and A Score larger than 6.4?
SQL: SELECT AVG(position) FROM table_name_47 WHERE b_score < 9.05 AND total = 15.275 AND a_score > 6.4