“Laws of meanness” exist! The book will introduce you to them and show you that they are mathematically beautiful. And besides, they can be useful in a variety of everyday situations where there is uncertainty and multivariance.Can the flapping of a butterfly's wings in Brazil cause a tornado in Texas? Is it true that it rains more often on weekends? Why is most of the work always left for the last night? Why "there are no comrades for the taste and color", and the bus almost always has to wait a long time? It's time to learn how the "laws of meanness" work - from the law of watermelon peel ("buying a multidimensional watermelon, you get mostly its peel") to Ettore's observation ("the next line always moves faster").Imperfection of our world and life patterns have an objective mathematical justification. With the help of real-life examples, the author will introduce you to the world of non-school mathematics: probability theory and mathematical statistics, as well as related areas - the theory of measures, Markov chains, stochastic processes, queues, dynamic chaos.For whom the book >For the curious reader who seeks to develop mathematical and critical thinking.For anyone who wants to be able to filter out the information noise and garbage in the news stream.From the author