CREATE TABLE table_5527 ("Venue" TEXT, "Home" TEXT, "Guest" TEXT, "Score" TEXT, "Attendance" FLOAT)

What is the sum of attendance when the score was 2:0?
SELECT SUM("Attendance") FROM table_5527 WHERE "Score" = '2:0'
SELECT SUM("Attendance") FROM "table_5527" WHERE "Score" = '2:0'