Problem 9.
You toss independently a fair coin and you count the number of tosses until the
first tail appears. If this number is n, you receive 2^n dollars. What is the expected
amount that you will receive? How much would you be willing to pay to play this
game?
这个问题困扰我2.5小时了
拜托有没有大神可以帮我解惑
我算出来期望值是无限
sigma(1/2)
但不管怎么想都不会是无限
这样代表你付多少钱玩此游戏都会回本且赚钱
有人可以解释吗?