Brand new, unused. This book is a write-in notebook containing all the example problems and PRACTICE questions from Chapter 1, "Combinations and Probability," of the reference book "Chart-shiki Kaiho to Enshu Mathematics A" published by Suken Shuppan. By completing this book, you can naturally improve your skills. ● I want to sell it as soon as possible, so I will try to offer a discount as much as possible. 160209