Hello

You didn't gave proper information of entrance exam. But if you are talking about kcet, here is the information.

If you want to get in BSc Agriculture then your marks for Physics, Chemistry and Biology are considered. So if you want to get into top colleges then you should have a rank below 2000. In order to get this rank, you should score more than 120 marks out of 180 in KCET if you want to get a BSc Agriculture seat in first round itself.

The allocation of seats depends on cutoff and it depends on various factors like

The difficulty level of the exam

Marking scheme

Number of candidates appeared

Number of available seats

Seat reservation of various categories

Previous year cutoff ranks/marks

For further details regarding marks vs rank go through following link;

https://engineering.careers360.com/articles/kcet-marks-vs-rank