CREATE TABLE table_4772 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the average crowd size when the home team scored 9.20 (74)?
SELECT AVG("Crowd") FROM table_4772 WHERE "Home team score" = '9.20 (74)'
SELECT AVG("Crowd") FROM "table_4772" WHERE "Home team score" = '9.20 (74)'