CREATE TABLE table_name_62 (decile NUMBER, authority VARCHAR2, roll VARCHAR2)

What is the average decile of the school with a state authority and a roll number of 888?
SELECT AVG(decile) FROM table_name_62 WHERE authority = "state" AND roll = 888
SELECT AVG("decile") FROM "table_name_62" WHERE "authority" = "state" AND "roll" = 888