Dear Krishna, as already discussed, to be eligible to study BioMedical Engineering, you should have passed your 10+2 with a minimum aggregate of 50%. It is 45% for Reserved Categories. You should have studied Physics, Chemistry, Mathematics as compulsory subjects with Biology/Biotechnology as an additional subject. Because it is an Engineering course, Mathematics is a mandatory subject. However if you really are interested in pursuing BioMedical Engineering, you can opt to study Mathematics as an additional subject from NIOS. NIOS is a recognised Board and it is also accepted in JEE and other Entrance exams which are important for securing an Engineering seat.