Dear Aspirant, according to these marks and previous year trends your rank might be around 15500-18000 range. ( this might not be accurate due varying trends every year) . Now according to previous year cutoffs there are very less chances of securing CSE at Coimbatore Amritha university. The closing ranks for Coimbatore Amritha University CSE  in 2017 was  13801.

You can check other cutoffs of Amritha university here : https://engineering.careers360.com/articles/aeee-cutoff