CREATE TABLE table_56189 ("Player" TEXT, "Rec." FLOAT, "Yards" FLOAT, "Avg." FLOAT, "TD's" FLOAT, "Long" FLOAT)

What is the total average for long 10?
SELECT COUNT("Avg.") FROM table_56189 WHERE "Long" = '10'
SELECT COUNT("Avg.") FROM "table_56189" WHERE "Long" = '10'