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_47 (wins INTEGER, class VARCHAR, rank VARCHAR)
### Question:
Tell me the average wins for class of 50cc and rank of 8th
### Answer:
SELECT AVG(wins) FROM table_name_47 WHERE class = "50cc" AND rank = "8th"