My friends and i are in a football pool where each week you have to pick a loser in a game. At the beginning of the year you purchase how many picks you want - the number of picks you buy determines how many choices you get each week to choose a loser. If you get it right your pick is still alive and you move to the next week. Get it wrong (i.e the team you chose won instead of lost), and your pick is out. We are trying to determine how many picks you would have to buy to garaurantee that you'd win. There are 13 teams in the NFL and there's 17 weeks of play.