Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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?
### Answer:
SELECT AVG(total) FROM table_name_9 WHERE silver = 0 AND bronze < 0