x=12

I'd take the 20% chance. As its a tidier sum for -5% and any figure below $100 isn't really going to change anything worthwhile.

This Q is rigged 🤪

Aim high - if you can afford to. I don’t see the point in gambling if the prize is a couple of quid - but maybe a couple of quid is the difference between eating a proper meal that day or just getting by to some people. Personally, I’d pay more to win more. But I think gambling is a mugs game, and I don’t do it. The only winners are the betting shops/casinos/whatever.

I like to make choices with the highest expected value even if the variance is high, so i take the 1/5 chance of winning 625 dollars.

I don't lmpw how the math shakes out, but at those numbers I go for the $625, the risk of missing out on a better chance at those lower numbers seems insignificant, I throw $16 down the drain all the time 😛