Hope you are doing good in this pandemic situation.

With your marks you have low chances of getting a seat in mathematics department in the second round. But you have high chances in third and fourth round. I will attach link to the direct pdf of second and fourth round you can check and confirm.

Don't lose hope be positive.

This is the official website. https://www.bkbirlacollegekalyan.com/default.aspx

This is the link to 2nd merit list

https://www.bkbirlacollegekalyan.com/Admin/NoticeAttachment/SecondMeritList-UnaidedCourses_.pdf

This is the link to 4th merit list

https://www.bkbirlacollegekalyan.com/Admin/NoticeAttachment/FourthMeritList.pdf