CREATE TABLE table_74735 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

How many people were present in a total of every crowd at the MCG venue?
SELECT SUM("Crowd") FROM table_74735 WHERE "Venue" = 'mcg'
SELECT SUM("Crowd") FROM "table_74735" WHERE "Venue" = 'mcg'