This workshop is a collection of individual tasks (typical calculations) on combinatorics and probability theory .. The presented basic concepts and theorems are accompanied by a large number of examples with solutions and questions for self-control. The first part of the workshop contains individual tasks on the following topics: combinatorics; random events; formulas of full probability and Bayes; Bernoulli scheme . The second part is devoted to random variables: discrete random variables; continuous random variables and their numerical characteristics; the most important distribution laws of continuous random variables and their properties, the most important laws of the theory of continuous random variables. Each model calculation contains 30 variants. Most of the tasks of typical calculations of the first part are plot. Tasks of the second part are applied. For students and teachers of technical, economic, agricultural, legal and other universities . The workshop can also be used by teachers to conduct additional classes with schoolchildren.