The choice isn't obvious... or else when it first came out in the 60s or 70s it wouldn't have been controversial. Even some math professors specializing in probability got it wrong. The columnist who wrote it received hundreds of letters from readers around the country saying that she has "No understanding of probability" , "Needs a basic course in Math" , "Misleading the American public". Among them was a UPenn Math professor! Later, he wrote her asking her not to reveal his identity because he is utterly embarassed by it.
It's amazing how hindsight is always 20/20.
To those who haven't seen it before, the question you should be asking yourself is: why aren't the remaining choices both 50/50? After all, you're picking one of two, so it's a 50% shot.
the Wii is an epidemic.
