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_9 (total INTEGER, silver VARCHAR, bronze VARCHAR)

### Question ###
What is the mean number of totals with no silvers and a bronze number less than 0?

### Accurate SQL ###

SELECT AVG(total) FROM table_name_9 WHERE silver = 0 AND bronze < 0