A goon has held your friend hostage. He says he will only take 2 shots at your friend. You want to save your friend. His revolver has 6 chambers. At first empty, he puts 2 bullets in successive chambers. He then spins it. He fires a shot at your friend, it was blank (empty chamber). Now he asks you if you want him to spin it again before taking the shot? or take the shot straight away. What will you tell him, to maximize the chances of your friend being saved? Calculate the probability of your friend being saved, for both cases.
