How to Decide Which Lottery Is the Rational One to Take

There is more than one rational approach to risk. Some people be more risk-averse, some people are more risk-aggressive. It doesn't seem like there's really an answer to that. But if you come back to my lovely hedonistic probabilistic utilitarism, there's a built-in calculus,. If on balance there's going to be more pleasure than or at least a greater chance of pleasure, then you pursue that.