Hello! What is the variance? What is my risk of loss? What is the variance of a gaming machine

To calculate this figure you need to know higher mathematics! Well, maybe there are mathematics among us ?!
Do you think that knowledge of higher mathematics will help to win? Most likely, both the professor of mathematics and the student who skipped classes, the chances of winning will be equal )
Young man, before entering into a discussion, please read the meaning of the concept of variance. Namely, the variance in slot machines and what kind of it happens.
I think the guy just did not fully understand what it was about) who does not happen)))