[andrewas]

Actualy the math is 0.96^20 chance of not being shot, which is a 44 percent chance of not getting shot. Thats assuming both of them have a 4% chance per shot, which I suspect isn't accurate at closer ranges when you are running directly away from them and are a relatively large target. Once you get away a bit you should be OK.

Its not particularly good odds on survival, but a lot better than the odds of surviving a direct shot to the back of the head after they relieve you of all your posessions.