Deal or No Deal is one of the most commonly chosen exploration topics, and moderators see many similar versions of it. Distinguish yours by digging into how the banker's offer compares with expected value trial by trial, rather than describing expected value in general.
Start here β this is the source that inspired this exploration.
Expected value in Deal or No Deal is simple to state and easy to explore only superficially, which is why examiners see this topic often. The differentiator is tracking, box by box through a real episode, how the banker's offer compares with the expected value of the boxes still in play, and using that comparison to test whether contestants who follow expected value actually do better.