How much marks should one get in class 12 to study B.Sc Actuarial science in Bishop Heber college?

There is no such cutoff for B.Sc Actuarial Science in Bishop Heber College. If you are from the Tamil Nadu State Board and have decent marks, you should get admission. But try to submit your application on the day of your 12th results. The aided seats get filled first. Most students that apply on result day get admission except for a few cases.