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_12 (total INTEGER, silver VARCHAR, rank VARCHAR)
### Question:
What is the average Total when silver is less than 1, and the rank is 15?
### Answer:
SELECT AVG(total) FROM table_name_12 WHERE silver < 1 AND rank = "15"