CREATE TABLE table_65293 ("Rank" FLOAT, "Athlete" TEXT, "Country" TEXT, "Time" TEXT, "Notes" TEXT)

What is the rank of the athletes that have Notes of fb, and a Time of 6:47.30?
SELECT SUM("Rank") FROM table_65293 WHERE "Notes" = 'fb' AND "Time" = '6:47.30'
SELECT SUM("Rank") FROM "table_65293" WHERE "Notes" = 'fb' AND "Time" = '6:47.30'