Hello student

hope you are doing well and safe. With reference to your query,  I would glad inform you for to be eligible for admission in bcom you need to have atleast 55 percent in 12th exams and maths is not complusory for bcom . Following are some colleges in karnatka who offer bcom:-

Mount Carmel College, Bangalore

St Joseph's College, Bangalore

St Aloysius College Autonomous, Mangaluru

Christ College, Bangalore

Following is the link for cut off:-

https://university.careers360.com/colleges/list-of-bcom-in-commerce-degree-colleges-in-karnataka

Hope you found this answer informative. Best wishes for your future