If the odds in favour of Boris beating Elena in a chess game are 5 to 4, what is the probability that Elena will win an upset victory in a best-of-five chess tournament?
----the answer is 7808/19683, i don't understand the chess thing basicly, i only can guess out what is the 19683, 3^9, but i don't know how to explain it. Can somebody explain me the chesses, and how to get the answer.
thanks a lot
i think an upset victory just means the person who is least likely to win, wins.
thus you need to find the probability of Elena winning the best of 5 games, which means she wins three
so you want the probability of her winning 3 games
that should give you the answer, but don't quote me on that. as i said, i am a noob with probability