CREATE TABLE table_name_70 (bush_number INTEGER, others_number VARCHAR(255), bush_percentage VARCHAR(255))
What is the average value of Bush# when the value for Others# is greater than 57, and the value for Bush% is 49.2%?
    
SQL: SELECT AVG(bush_number) FROM table_name_70 WHERE others_number > 57 AND bush_percentage = "49.2%"