CREATE TABLE table_37569 ("Year" FLOAT, "Class" TEXT, "Team" TEXT, "Points" FLOAT, "Wins" FLOAT)

Which Wins have a Year of 1963, and a Class of 50cc?
SELECT AVG("Wins") FROM table_37569 WHERE "Year" = '1963' AND "Class" = '50cc'
SELECT AVG("Wins") FROM "table_37569" WHERE "Class" = '50cc' AND "Year" = '1963'