Hello Student
For doing BE in Biomedical Engineering students have to pass 12,th class with science with physics Mathemetics/ Biology. But students have to qualify in jee mains exam and for this exam Mathematics subject is compulsory.So you have to pass mathematics subjects before appearing  for jee mains exam.Only class 12with PCB is not main criteria for taking admission in BE in Biomedical Engineering  courses admission.
Hope this helps.