# Gambling at St. Petersburg Casino

**Discrete Mathematics**Level 3

A casino offers a game of chance for a single player in which a fair coin is tossed at each stage. The pot starts at 2 dollars and is doubled every time a head appears. The first time a tail appears, the game ends and the player wins whatever is in the pot. Thus the player wins 2 dollars if a tail appears on the first toss, 4 dollars if a head appears on the first toss and a tail on the second, 8 dollars if a head appears on the first two tosses and a tail on the third, 16 dollars if a head appears on the first three tosses and a tail on the fourth, and so on. In short, the player wins \(2^{k}\) dollars, where \(k\) equals number of tosses (\(k\) must be a whole number and greater than zero). In dollars, what would be a fair price to pay the casino for entering the game?

Note: This problem is not original. Credits to: Nicolaus Bernoulli (1687-1759).

**Your answer seems reasonable.**Find out if you're right!

**That seems reasonable.**Find out if you're right!

Already have an account? Log in here.