Hello aspirant,

In Aligarh Muslim University entrance exam for engineering, cutoff marks for general catagory is 75 to 80.

Cutoff marks for SC/ST catagory is 70 to 75.

This cutoff matks is determined by studying the no. of students appeared, no. of students qualified, total no. of students, difficulty level etc.

For preparation of it, you may follow these books:

Physics: H. C. Verma

Chemistry: Ncert, R. C. Mukherjee

Math: R. D. Sharma.

All the best !!

:)