CREATE TABLE table_23708 ("Rank by average" FLOAT, "Place" FLOAT, "Couple" CLOB, "Total points" FLOAT, "Number of dances" FLOAT, "Average" CLOB)

What couple has an average of 17.2?
SELECT "Couple" FROM table_23708 WHERE "Average" = '17.2'
SELECT "Couple" FROM "table_23708" WHERE "Average" = '17.2'