(Ignore the thumbnail, it's because it's all variables) This is the Monty Haul Problem: There are three doors. One has a Lambo behind it. The other two have goats. You choose door 3, then door 1 is revealed to have a goat. Do you switch, or stick with your door? Answer: You always switch? I didn't know how this worked, and I still don't understand how it works. But here you go!
I hate this. My brain ached for hours on end.