Butch, based on your post, I am assuming the situation you stated makes the assumption that you have dependent children and spouse.
That was my assumption - that you have spouse and children and you see someone in danger and you realize that you can attempt to help them and that if you do there is a 50/50 chance you will die in the attempt. Do you help?
If single and no kids, it's still a good question at 50/50.
The problem is that without a very detailed 3 dimensional scenario to evaluate it is actually impossible to answer the question accurately. Best we can do is generalize, so the 50/50 question is an attempt to generalize on a smaller scale.
‘‘Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest.’’ ~ Mahatma Ghandi, "Gandhi, An Autobiography", page 446
‘‘The great object is that every man be armed. Everyone who is able may have a gun.’’ ~ Patrick Henry