CREATE TABLE table_20748 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Date" TEXT, "Crowd" FLOAT)

Name the away team score for carlton
SELECT "Away team score" FROM table_20748 WHERE "Home team" = 'Carlton'
SELECT "Away team score" FROM "table_20748" WHERE "Home team" = 'Carlton'