The book "Probability Theory, Elements of Mathematical Statistics and Mass Service Theory" by A. D. Korznikova is a fascinating and deep dive into the world of mathematical concepts, which are of great importance in modern society. This publication will become an indispensable assistant for students, graduate students and practitioners in the field of mathematics, statistics, economics and engineering . In his book, Korznikov offers the reader a unique approach to understanding probability theory and statistics, combining theoretical foundations with practical examples. It does not simply state dry formulas and theorems, but creates a living picture in which mathematical concepts become tools for analyzing real-world situations. The reader will be able to see how probabilistic models help in decision-making, forecasting and process optimization in a wide variety of areas from finance to engineering design. The book covers a wide range of topics, from the foundations of probability theory to elements of mathematical statistics and mass service theory. Korznikov focuses on how these disciplines are interrelated and how they can be used to solve practical problems. For example, the reader will learn how to use probability models to assess risks in business or how statistical methods help in research activities. This book will be especially interesting for those who seek to deepen their knowledge in the field of mathematical sciences and apply them in practice. Students studying mathematics, statistics, economics or engineering majors will find useful materials in it to prepare for exams and write term papers. It will also be useful to practitioners working in the field of analytics, financial analysis and project management. The topics raised in the book are relevant and important in today's world, where data and information play a key role in decision-making. Korznikov shows how important it is to be able to analyze data, draw conclusions and make informed decisions based on statistical methods. This makes the book not only a tutorial, but also a practical guide for anyone who wants to become more competent in their professional activities. The author's style is distinguished by clarity and accessibility, which allows even complex mathematical concepts to be explained in simple and understandable language. Korznikov knows how to captivate the reader, making the material not only useful, but also interesting . His previous work has also been recognized for its practical focus and accessibility, making him one of the authors sought after for knowledge in mathematics and statistics. If you are looking for a book that will help you understand complex mathematical concepts and teach you how to apply them in real life, “Probability Theory, Elements of Mathematical Statistics and Mass Service Theory” will be an excellent choice. This edition will not only expand your knowledge, but also inspire new discoveries in the fascinating world of mathematics. Read, explore and discover new horizons with this wonderful book!