Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

sample space

The set of every possible outcome of an experiment.

The sample space $S$ of an experiment is the set of every distinct possible outcome.

Examples

Rolling one die: $S = \{1,2,3,4,5,6\}$ .