According to the knowledge learned in high school, we can use the mean and variance to model:

First of all, each student scored a highest score and a lowest score in every subject (overachievement and mistakes will greatly affect the average score)

The subject with high average per student is a strong subject; The mean value is the same, and the intensity variance is small. In this way, we can rank each student's subjects.

Calculate the total score according to this average score, and you can predict who can get into a book.

The so-called increase in the number of people online in a book is to improve the scores of students whose average scores have not crossed the line, improve the average scores of weak subjects, and reduce the variance of scores in various subjects.