Hi

As per your request Since there id difference within the difficulty level of the examination held by Tamil

Nadu board and state board of other states,the percentage is calculated by a normlisation process.For

example,if the very best mark obtained by a candidate of Tamil Nadu Board is 100, in say Chemistry, and

by a student from another board is 90, both the scores are going to be treated as adequate to 100. If

another candidate of an equivalent board scores 60 within the subject (where the very best mark is 90),

it'll be considered as like 66.66.

100*60/90 = 66.66

So, to calculate your percentage during a subject you would like to understand the higest marked scored

therein subject in Tamil Nadu board and your own board.Divide the higest mark in TamilNadu board to

your board highest then multipy it together with your marks to urge your percentage within the

particular subject.

If there's any tie between the marking of candidates the rank are going to be decided within the

following manner:

Percentage of marks in Mathematics

Percentage of marks in Physics

Percentage of marks within the fourth optional subject

Date of birth of the candidate (the older candidate will get preference)

Assigned random number (higher the random number, the upper the priority.

https://engineering.careers360.com/articles/tnea-rank-list

From above mentioned link you can get information.

Hope helpful.