Truth be told, random number generators do not set slot machine odds. That being that slots odds are wholly determined by random number generators (RNGs).
This broad topic routinely covers many parallel areas such as casino hold percentages, random number generators, slot odds, and the like.
The answer to this question lies in the complex mathematical codes, and programming that governs the results of every slot spin. Slots players want to understand how slot machines are programmed.
They do this by way of Random Number Generators (RNGs).