fidudu :
for those who don't understand, to make it more intuitive, lets say we have 52 cards, to win, you need to get ace of hearts, and the host knows all the cards, initially whatever cards you chose, the chance is 1/52, and after that, the host open all other 50 cards, and none of them are ace of hearts, so it left with two cards: your initial choice, and another one which you didn't choose, so, your card, still 1/52 chance and the another card become 50/51 chance to get an ace of hearts
2024-10-16 14:29:08