CREATE TABLE table_4898 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

How many people watch an away team score 6.9 (45)?
SELECT AVG("Crowd") FROM table_4898 WHERE "Away team score" = '6.9 (45)'
SELECT AVG("Crowd") FROM "table_4898" WHERE "Away team score" = '6.9 (45)'