hii Suresh

frankly to say you have pretty low marks in JEE as SASTRA take admission with 2 streams

B.Tech admission 2018 in Sastra University will follow the procedure mentioned below:

Stream 1:

JEE Main 2018 and normalized 10+2 scores will be taken together for admission under stream 1

The scores of JEE Main will carry 25% weightage and 10+2 scores will carry 75% weightage.

The combined scores will be used to prepare the rank list and candidates will be invited for admission on the basis of the rank list.

70% of seats will be filled under stream 1.

Stream 2:

Candidates will be considered for admission based on their normalised aggregate 10+2 or any equivalent exam scores.

30% of seats will be filled under stream 2.

i suggest you to go with 2nd stream as you have the pretty well marks in +2 but probably is that you may get so try for the best

all the best:)