This set of "Engineering Mathematics" is a mathematics textbook for computer, electronics and communication majors in colleges and universities, which is divided into three volumes. This book is the third volume, including probability statistics and discrete mathematics. The part of probability statistics includes the basic knowledge of probability theory, the independence of conditional probability and events, random variables and their distribution, two-dimensional random variables and their distribution, functions and their distribution of random variables, numerical characteristics, statistical basis, statistics and sampling distribution, parameter estimation and hypothesis testing. Discrete mathematics includes mathematical logic, set, relation and function, algebraic system and graph theory.

This book focuses on basic concepts, basic theories and methods, emphasizing intuition and application background, paying attention to readability and facilitating self-study. In addition, there is a teaching reference book "Engineering Mathematics Exercises and Solutions" for teachers and students' reference.