HI

Sastra takes admissions under this method

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.

sastra will calculate rank in the following way (12th percentage * 0.75+jee main mark * 0.25)  total 165. on the basis of this score you are iven ranks.

Thus,admission solely depends on your rank in sastra's merit list which will be uploaded after a while. For cse the rank must be not more than 500. Only then, u will have a chance. All this is for stream 1. Coming to stream 2 ur board percentage should be more than 98.6%.

So on the basis of your performance, you are likely not to get admissions in the university in cse...

Hope this helps!!