PROBABILITY That's an 11-letter word. If we could tell the 2 B's apart and the 2 I's apart, the answer would be 11! However, since we can't, we must divide by the number of ways the 2 B's can be swapped within each arrangement which is 2!. Also we must divide by the number of ways the 2 I's can be swapped within each arrangement which is also 2!. Answer:Edwin