Have you ever encountered this mathematical conundrum of the three doors, two hide a goat and the third hides a car. You select a door to try and win the car. The game show host reveals one of the hidden goats and asks you if you want to stick with your original choice of door. There are now two doors left, one has a goat behind, the other has a car behind and the host asks you if you would like to stick or swap. The mathematics say its a 50/50 chance, so you may as well stick with your original choice. Wrong, always swap, you have double the chance of winning the car. Don’t believe it, watch this video.
https://www.youtube.com/watch?v=o_djTy3G0pg