Ⅰ.
Permutations and combinations
01 Various permutations
02 Overlapping combinations and binomial theorem

Ⅱ.
probability
03 Meaning and Use of Probability
04 Conditional probability

Ⅲ.
statistics
05 Random variables and probability distributions
06 Binomial distribution and normal distribution
07 Statistical Estimation

A problem-solving book that makes math easier

Concept organization and type classification faithfully reflecting the 2015 revised curriculum
Presented by subdividing the types
Collect and analyze past exam questions from across the country to present frequently appearing questions.
Optimal descriptive subjective questions based on the increased proportion of descriptive questions
Enhanced problem-solving capabilities with detailed explanations

1.
The optimal problem-solving textbook that reduces learning burden
It is structured to cover the essential concepts for each topic in detail and to allow sufficient practice of basic types.
By boldly omitting difficult content, questions that are rarely tested, or questions that do not fit recent test trends, we have reduced the learning burden and improved the learning achievement of students who struggle with math.

2.
Type segmentation
After covering all the questions from easy school exams, the College Scholastic Ability Test (CSAT), the Evaluation Institute of Education, and mock exams administered by the Office of Education, we've broken them down into more specific types based on the concepts and solutions needed to solve the problems, allowing you to learn problem-solving strategies for each type.

3.
three-dimensional learning
The difficulty of the problems is divided into two levels, A and B. Level A reinforces the basic problems, and level B further subdivides the types, allowing for three-dimensional learning by level of difficulty and type.

4.
Type practical finishing
We have organized the final learning problems for each type of Stage B to help you develop problem-solving skills for each type and prepare you perfectly for real-world situations.