What's the average round the position of RB was drafted?
CREATE TABLE table_name_90 (round INTEGER, position VARCHAR)
SELECT AVG(round) FROM table_name_90 WHERE position = "rb"
### Context: CREATE TABLE table_name_90 (round INTEGER, position VARCHAR) ### Question: What's the average round the position of RB was drafted? ### Answer: SELECT AVG(round) FROM table_name_90 WHERE position = "rb"