probability pls help

Question

A, B, C, D were given pistols for a competition. The participants will try to shoot their competitors. If the person is hit, that person will be out of the competition. The shooting will turn in alphabetical order and will repeat once all have attempted a shot. The participants will take other participants at a higher rate. A has a hit rate of 0.3, B has a hit rate of 1, C has a hit rate of 0.5, and D has a hit rate of 0.7. What is A's winning probability?

Answer 1

Well, A's chance of winning is 100%, since she has the lowest rating and no one is allowed to shoot her, only people with a higher rating. B can't shoot anyone because his rating is the highest. C can shoot B and D. Without working out the sequence, it seems that B, C, and D will all eventually be shot, leaving A only unshot.

Answer 2

If the losing probability is 0.3 (i.e., 30%), the winning probability is 1 - losing probability. Thus, the losing probability is 1 - 0.3 = 0.7 (i.e., 70%).