This book is designed as a textbook primarily for MBA students. It is also for Accountancy ( Chartered and Cost Accountancy). Commerce and Economics students. The book covers concepts, illustrations and problems in Statistics , Operations Research & Mathematics. Part I deals with statistical techniques for decision making; Part II studies various operations research techniques for managerial decisions and Part III provides supplementary management viz., Production, Finance, Marketing and HR and are designed to understand many managerial decision making situations. In order to make the book self-contained, all relevant mathematical concepts and their applications have been included. To enhance the understanding of the subject matter by the students belongings to different disciplines, the appraoch adopted in this book is conceptual rather than excessively mathematical. This book is useful not only to the students of management but also to other professionals such as industrial engineers and social scientists.