Hey there!!

The cut off marks of tnea can be calculated from the 12th marks. Take your physics, chemistry and mathematics marks . Divide the physics and chemistry marks by 4 and divide the mathematics marks by 2 , add the three results you will get the engineering cut off marks out of 200 .

the formula is simple cut off mark=(physics/4)+(chemistry/4)+(mathematics/2)

To know more about the tnea exam process you can refer the link given below:

https://engineering.careers360.com/articles/tnea-counselling

Hope this helps

Good luck!!