Your question is Marksman Skill Inference. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Smith's chance of hitting his target on a given shot is twice that of his fellow prison guard, Jones. One dark night they each had time to fire one shot at an escaping prisoner. Given that the prisoner had an even chance of avoiding injury, what kind of a marksman was Jones?