Questions about the branch of mathematics concerned with modeling and analyzing random phenomena.
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates the impossibility of the event, and 1 indicates certainty. The higher the probability of an event, the more likely it is that the event will occur.
Modern Cryptography has strong usage on the probability. The indistinguishability, the probability of the success of the adversary, etc.