text: 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_93 (roll INTEGER, authority VARCHAR, decile VARCHAR)
  ### Question:
  What is the average roll of a school with state authority and a decile of 9?
  ### Answer:
  SELECT AVG(roll) FROM table_name_93 WHERE authority = "state" AND decile = 9