What is the average roll for Fairfield school?
CREATE TABLE table_name_18 (roll INTEGER, name VARCHAR)
SELECT AVG(roll) FROM table_name_18 WHERE name = "fairfield school"
### Context: CREATE TABLE table_name_18 (roll INTEGER, name VARCHAR) ### Question: What is the average roll for Fairfield school? ### Answer: SELECT AVG(roll) FROM table_name_18 WHERE name = "fairfield school"