Список проголосовавших за комментарий "Evgeny Baranov, то сеть вы считаете что в этом абзаце речь не о вероятности?<blockquote><p>For example, a player has $100. He can bet $50 at odds of 1 and have a 50% probability of winning. If he wins, the player will win $50 and his pot will end up equal to $150: $50 bet, $50 left in his hands and $50 won. That is, the player’s capital increases by a third. If the player loses, the player will lose $50 and the pot will be equal to $50. Then the player’s capital will be halved</p><p>The mathematical expectation in this case is obviously as follows:</p><p>(50 * 0,5) + (-50 * 0,5)<br/> = 0.</p></blockquote><br/> <br/> "