Well, Oton is somewhat right (unless a guild builds a Cosmodrome and starts monitoring every single inhabitant of the dungeon, so that such an acucuracy is achieved... in upper stages of Blood Sons' Fort the chances of encountering a certain group of opponents are between 2% and 3%... Now really- who can have such a certainty and be able to say what the odds of fighting a disorganised mob of bandits OR chaotic migrating wolfpack are? If I go to a fortuneteller I doubt she will be able to predict what my chances to catch a 15lbs catfish or a 23lbs one are)