Linear algebra is usually the fifth edition of Tongji, light purple skin, higher education press, a book.
Probability can use the third and fourth editions compiled by Zhejiang University, with the same content. Higher Education Press is a light blue book.
There are many versions of the answers, but the answers to the questions after class are all the same, that is, the summary content of each chapter is different, so you can buy them according to your own situation. If the level is good, look at the answer and buy a thin one. If the foundation is not good, look at what others have summarized and buy thick ones.