As per my knowledge , T here is no such criteria ( minimum JEE marks/12th board marks) for admission in to SASTRA university . SASTRA university has a separate procedure through stream 1 and stream 2 .

IN  Stream 1 -

70 percent seats of every branch are filled through stream 1 based on 12th percentage ( 75 percent after normalisation ) + JEE mains score ( 25 percent )

For example :-

12 th percentage - 88 (CBSE) and JEE mains score is 80 .

Normalised percentage of board would be as follows

88 * 100/98.6 = 89.25

( Assuming percentage of topper is 98.6 )

Now 89.25 * 0.75 + 80 * 0.25 = 86.94

This is your final score . AIR (SASTRA) is prepared based on this final score . There is a chance AIR up to 4000 .

If someone is a topper of board exam and his JEE mains score is 40 then final score would be 85 and AIR (SASTRA) would be above 5000 . It proves that t here is no chance for JEE mains score below 40 in stream 1 .

IN Stream 2 -

Second criteria includes admission on the basis of boards marks only. But it has only 30% of seats , so for this criteria u should be having 95 or 95+ for securing your seat as in this criteria competition may be very tough.

(Note:- merit list of both criteria is prepared diffrently .)

Hope it helps.

All the best.

Cheers !!!