Let's Make a Deal!

The Interactive Monty Hall Problem



Many smart people, including some world class mathematicians, have been fooled by this clever puzzle:
Believe it or not, you're much better off choosing one option over the other (click the "Show Solution" link below to find out why). Try it for yourself using the interactive simulation below. Click on a door and follow the instructions on the right. You'll need several trials to get accurate results or you can click one of the Auto-Run buttons, which lets your computer do the work - you can see the results of thousands of trials in just a few minutes!

Door #1 Door #2 Door #3

 
StrategyWinning PercentageTotal Trials
Stick
Switch

 

 

 

 
Show Solution