Predict future weather using the probability that tomorrow is wet given today is wet and the probability that tomorrow is wet given that today is dry.
If the score is 8-8 do I have more chance of winning if the winner is the first to reach 9 points or the first to reach 10 points?
A player has probability 0.4 of winning a single game. What is his probability of winning a 'best of 15 games' tournament?