CREATE TABLE table_46367 ("Year" FLOAT, "Show" TEXT, "Season" FLOAT, "Episode" TEXT, "Episode number" FLOAT, "Original airdate" TEXT)

What is the average Episode Number, when Original Airdate is March 21, 2010, and when Season is less than 3?
SELECT AVG("Episode number") FROM table_46367 WHERE "Original airdate" = 'march 21, 2010' AND "Season" < '3'
SELECT AVG("Episode number") FROM "table_46367" WHERE "Original airdate" = 'march 21, 2010' AND "Season" < '3'