Well, no matter what subject, as long as it is science, the most important thing is to be clear-headed. I learned probability well in high school, and now I'm preparing for the postgraduate entrance examination. This foundation is very useful. If you feel afraid that you can't learn probability well, I have a good method, which is nothing more than some formulas and some normal distributions. List the definitions, knowledge points and formulas in probability with a few sheets of paper. Don't be afraid of trouble, it will be quick. If you want to learn well, these two hours are worthwhile. This is the most systematic method. When doing the problem, it is of course best if you can remember all the things listed (most people should remember, after all, the probability of high school is just a marginal ball). It doesn't matter if you can't remember. Just follow the example and practice two more questions.

If you are not afraid, you will learn well!