This manual is intended for students studying in the specialties 010400 - Physics, 032200 - Physics, 030100 - Informatics, 030500.06 - Vocational training (informatics, VT and computer technologies), in the areas of 510400 - Physics, 511800 - Mathematics, computer sciences, to practice the skills and abilities of mathematical and computer modeling of physical phenomena and objects using the Monte method-Carlo. It can be used when conducting a computational workshop, when giving lectures on mathematical and computer modeling and when setting problems in course and diploma design by university teachers, teachers, graduate students.