The Movie “ 21” Variable Change Issue

[Angela GSD]

After reading previous discussions on the topic of “Variable Change” as it pertains to the movie 21 with Kevin Spacey... I am still convinced that the chance is 50/50 and the student moving his choice from door 1 to door 2 does NOT increase his chances after the elimination of door 3.
Please enlighten me wise colleagues.

 

[berkeman]

After reading previous discussions on the topic of “Variable Change” as it pertains to the movie 21 with Kevin Spacey... I am still convinced that the chance is 50/50 and the student moving his choice from door 1 to door 2 does NOT increase his chances after the elimination of door 3.
Please enlighten me wise colleagues.

Welcome to the PF. I have no idea what you are talking about without using Google, and do you mean previous discussions here at the PF? My brief PF search did not match any of your keywords.

Please re-post in the General Discussion forum, and provide links to what you are asking about. You will get much better responses if you can help us with the context of your question. Thanks!