You should atleast get 40% out of 100 marks to be passed. 80 marks are for theory and 20 marks are for practicals. You should score 40% in both combined. Exam will be in 80-20 pattern with 80 marks as university exam and 20 marks will be internal exam. In order to pass the examination, you have to obtain 40% of marks out of 100 including university exam 80 and internal exam 20. You can only keep your term if you fail in maximum 3 papers. So you should atleast score 40 and above.