This is greyed out, but I tend to agree with the sentiment that there’s a right way and a wrong way to approach these “EV” questions. OP was a bit harsh with th

This is greyed out, but I tend to agree with the sentiment that there’s a right way and a wrong way to approach these “EV” questions. OP was a bit harsh with the stupid comment, and for SWEs EV understanding is not usually a critical thing, but ultimately you’re being asked about the probability and the ability to make good decisions. Trading firms make use of this when hiring traders (most famously Jane Street and also SIG); The thinking is that if someone makes bad decisions with toy games, and their thought process is not analytical, they’re going to make for a bad trader, not making good decisions with millions of dollars on the line. A good example of something that would rule out a trader is: You can flip a coin, if you win you get $1m, if you lose you lose $1m. Would you play? The EV is zero, but the question is about bankroll management and disaster avoidance. As an individual the downside risk of a $1m loss (usually) significantly outweighs the upside of a $1m gain.