Hello Aishwarya,

Yes you can give the exam but you need to score minimum of 50% in PCM and should have overall aggregate of 75% beacuse it is the minimum requirement to sit for the counselling for more details you can go to https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-eligibility-criteria/amp. 

But as a graduate I would suggest you to try little hard and try to score more as few days are still left for the exams and by doing little more hard work you can score good. Scoring good in 12th not only help you in getting good college but will also help you when you apply for any Job after graduation.

Hope this will help. Wish you all the luck for the exams.