"Let's make a deal" problem

[pococurante]

BTW I was reading another forum that discussed this recently. It didn't take long for everyone to agree that switching is obviously the best choice.

But then someone brought up the show Deal Or No Deal, and sooooooooo many people couldn't understand the odds on that game, the discussion lasted forever. It was impossible to get some people to understand that there's a difference between a game that is purely random, and a game that is manipulated by someone with knowledge of where the prizes are.