CREATE TABLE table_name_49 (authority VARCHAR, roll VARCHAR, gender VARCHAR, decile VARCHAR)

which Authority has a coed school with a decile greater than 4, with a 150 roll?
SELECT authority FROM table_name_49 WHERE gender = "coed" AND decile > 4 AND roll = "150"
SELECT "authority" FROM "table_name_49" WHERE "150" = "roll" AND "coed" = "gender" AND "decile" > 4