CREATE TABLE table_3715 ("Episode #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Originalairdate" TEXT, "Ratings" TEXT)

Name the total number of written by for 26 july 2010
SELECT COUNT("Written by") FROM table_3715 WHERE "Originalairdate" = '26 July 2010'
SELECT COUNT("Written by") FROM "table_3715" WHERE "Originalairdate" = '26 July 2010'