According to the reports , it can be predicted that for 12th , cutoff marks are calculated by converting the Maths marks to 100, Chemistry marks to 50, Physics marks to 50 and then adding them up. The cutoff total marks will be a maximum of 200. The calculation of the result by dividing your marks to the total marks and then multiply it by 100. You can get your percentage of the marks. Hoping for the best. Thank you . For more information refer to

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