CREATE TABLE table_48936 ("Opposing Team" TEXT, "Against" FLOAT, "Date" TEXT, "Venue" TEXT, "Status" TEXT)

Which Against has a Date of 30/05/1981?
SELECT COUNT("Against") FROM table_48936 WHERE "Date" = '30/05/1981'
SELECT COUNT("Against") FROM "table_48936" WHERE "Date" = '30/05/1981'