Table schema:
CREATE TABLE table_name_75 (total INTEGER, nation VARCHAR, gold VARCHAR, bronze VARCHAR, silver VARCHAR)

Question: What is the average Total, when Bronze is greater than 0, when Silver is greater than 0, when Gold is greater than 2, and when Nation is Soviet Union?
SQL: SELECT AVG(total) FROM table_name_75 WHERE bronze > 0 AND silver > 0 AND gold > 2 AND nation = "soviet union"