The book has been prepared according to the syllabus of various Technical Universities in India and is conceived as a textbook for the course in Master of Technology/Engineering of all branches and specializations. The contents of the book have been systematically organized and spread over twenty three chapters. Each chapter begins with the fundamentals and explained with different type of solved examples. The book not only covers the entire scope of the subject but explains the philosophy of the mathematical methods, statistical methods, numerical methods, computational methods including Matlab; and makes the understanding of the subject more interesting.