CREATE TABLE table_50846 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What was the attendance during the match that took place after week 11 against the washington redskins?
SELECT MAX("Attendance") FROM table_50846 WHERE "Week" > '11' AND "Opponent" = 'washington redskins'
SELECT MAX("Attendance") FROM "table_50846" WHERE "Opponent" = 'washington redskins' AND "Week" > '11'