1. A lazy fisherman decides to cast till he has caught single fish. If the stream is so well stocked that upon average person catches fish every 10th try, determine the probability that fisherman will catch fish after exactly 5 tries?
2. A volleyball team has 70% chance of winning each point while it is the serving team. As soon as the serving team fails to score, it should give up service. Determine the probability that the score will be 5 to nothing before the serve is lost by this team for the first time?