CREATE TABLE table_66699 ("Name" TEXT, "Gender" TEXT, "Area" TEXT, "Authority" TEXT, "Decile" FLOAT)

How many deciles have a Gender of coed, an Authority of state, and a Name of mount maunganui school?
SELECT SUM("Decile") FROM table_66699 WHERE "Gender" = 'coed' AND "Authority" = 'state' AND "Name" = 'mount maunganui school'
SELECT SUM("Decile") FROM "table_66699" WHERE "Authority" = 'state' AND "Gender" = 'coed' AND "Name" = 'mount maunganui school'