Ahh I see! Thanks!There is weightage for each paper!
For physics, Paper 6 = 20% , it is out of 40, so converted to 20
Paper 3 = 50%, it is out of 80, so converted to 50
Paper 1 = 30%, it is out of 40, so converted to 30
The total is now 100, so multiplied by 2, so that it become 200 as mentioned in threshold
(OR just multiply the sum of marks obtained by 1.25, many ways actually )
I hope it helped