CREATE TABLE table_name_51 (rank NUMBER, total VARCHAR2, gold VARCHAR2)

What is the rank of the Nation that has fewer than 24 total medals are more than 7 Gold medals?
SELECT AVG(rank) FROM table_name_51 WHERE total < 24 AND gold > 7
SELECT AVG("rank") FROM "table_name_51" WHERE "gold" > 7 AND "total" < 24