CREATE TABLE table_54980 ("Rank" FLOAT, "Nation" CLOB, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

What is the mean number of totals with no silvers and a bronze number less than 0?
SELECT AVG("Total") FROM table_54980 WHERE "Silver" = '0' AND "Bronze" < '0'
SELECT AVG("Total") FROM "table_54980" WHERE "Bronze" < '0' AND "Silver" = '0'