Hii,

Yes, with a 50% in 12th, you can apply for a B.Pharmacy program at a private college.  Most private institutions have minimal eligibility requirements of roughly 50% in 12th grade, particularly in areas such as biology, chemistry and physics.

However, each college may have its own admissions process, which could involve entrance examinations or direct admission based on your 12th grade results.  It is critical to research the unique requirements of the private universities you are interested in.