Hii mrudul 

Yes in hsc the marks of practical and theory are combined together after both paper one should get atleaat  35% to pass hsc 

For example 

X score in 22 marks in theory out of 70 marks and x score 25 marks in practical out of 30 marks and combined both total 47 out 100 these how hsc board follow 35% criteria

Hope it will help out !