Monty Hall Phenomenon

A Probability Demonstration

Below is a picture containing three colored cups, one red, one blue, and the third green. Underneath one of the cups. I have hidden a steel ball. As you might guess, I know where the ball is, but you do not. You are to begin by first picking one cup, under which you believe the ball is hidden. I will then remove one of the other two cups and ask you whether you wish to hold on to your original choice, or switch to the remaining cup. I will then show you where the ball is hidden, and we will see who wins.

Lets begin. Below are the red, blue, and green cups. Pick the cup under which you believe the steel ball is hidden.  Make your selection to the left (Red, Blue, or Green), or return to the previous screen or homepage.