hi,

see the previous  question paper is not disclosed by the respective university, you can buy a book from eCommerce site or book store which has previous years solved paper. AMU (Aligarh Muslim University) B.Com. With Model Paper by arihant publications.

you may get an idea about the structure of the entrance test for b,com admission from below link:

https://university.careers360.com/articles/amu-exam-pattern