What is the best way to compare the real price of lottery tickets and sportsbook bets?

How to use this answer

The principle is supported by the referenced rules, but a different operator or market can apply a different settlement condition. Treat the named provider as a specific example, not as a universal betting rule.

Use the precise stake, decimal odds, market terms and outcome probabilities when calculating the result. Expected value measures an average over hypothetical repetitions, not a guaranteed profit.