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?
這個問題困擾我2.5小時了
拜託有沒有大神可以幫我解惑
我算出來期望值是無限
sigma(1/2)
但不管怎麼想都不會是無限
這樣代表你付多少錢玩此遊戲都會回本且賺錢
有人可以解釋嗎?