Actually, he meant a 75% chance of winning.. Given the chance of winning a round is p=0.5, the chance of losing is q = 1 - p = 0.5 If you've lost the first ro

Actually, he meant a 75% chance of winning.. Given the chance of winning a round is p=0.5, the chance of losing is q = 1 - p = 0.5 If you've lost the first round, the odds of you twice in a row are q = 0.5^(2 rounds) = 0.25 Which means the odds of you winning are p = 1 - q = 1 - 0.25 = 0.75.