Hi Radha,

Normalization of NATA marks will be done on the basis of exam results. You can normalize your score by using the below method:

You scored 115 in NATA and 73.3% in your boards,
then the normalized score will be 115/2+73.3=130.8

This is your composite score. Your admission in college will depend on this composite score.

Also you have not mentioned your category.

You can find more details at:

https://engineering.careers360.com/articles/nata-result

I think it will be tough for you to get admission in Anna University, especially if you do not belong to any reserved category.

For more details, please follow:

https://dqxeclau.top/university/anna-university-chennai

Hope this helps!