Many state lotteries have a game where the player chooses a three-digit number. When the winning number is drawn, any player who chooses exactly the same three-digit number wins a prize. Mr. Cohen and Ms. Yang have a conversation about their lucky numbers. Mr. Cohen thinks that his number is a better number to play, because the three digits are all different. Ms. Yang things that her number is a better number to play, because the 1 digit is repeated. Is Mr. Cohen right? Is Ms. Yang right? What would you tell each of them about their chances of winning?