Playing Pick 4 Th e Pick 4 games in many state lotteries

Chapter 7, Problem 7.8

(choose chapter or problem)

Playing Pick 4 Th e Pick 4 games in many state lotteries announce a fourdigit winning number each day. Th e winning number is essentially a four-digit group from a table of random digits. You win if your choice matches the winning digits, in any order. Th e winnings are divided among all players who matched the winning digits. Th at suggests a way to get an edge. (a) Th e winning number might be, for example, either 2873 or 9999. Explain why these two outcomes have exactly the same probability. (It is 1 in 10,000.) (b) If you asked many people whether 2873 or 9999 is more likely to be the randomly chosen winning number, most would favor one of them. Use the information in this section to say which one and to explain why. (If you choose a number that people think is unlikely, you have the same chance to win, but you will win a larger amount because few other people will choose your number.)