There is no 0?!?!?....I'll be honest, EPAK does train for multiple attackers and just one on one, but I know my strength in MA is in the precision of things like the forms/katas or demo-ing techniques. I honestly think in a real life situation, that in all probability I might make hurting me more painful than an attack on an untrained person, but I have little belief I would "win". That said, a) if I am fighting for my life, god help you, b) I will never give up and c) I don't think anyone truly knows how they will react to a given hostile situation until they are smack dab in the middle of it, I don't think until that point you would know how you will react, no matter how skilled you are.
My assumptions are based upon a non-gun attack, if someone shoots me from 30 feet away, none of the training in the world will help me much....