Hey.

You can get admission through JAM without mathematics in Class 12th too in selected courses. Some courses have a requirement of maths in 12th Class like Chemistry, Mathematics, Economics etc and rest of them dont.

You can use the link below for more details about each course.

https://www.google.co.in/amp/s/university.careers360.com/articles/jam-eligibility-criteria%3famp

Best of luck!