Hi,
Thanks for asking careers360,
Yes you are having a bleak chance there
As Expected cutoff for Rajasthan state:

Rajasthan - for general and obc students 550 marks, for sc students 440 marks, for st students 400 marks.
you can check your rank here:

Https://medicine.careers360.com/articles/neet-rank-predictor

For Knowing details of cut-offs and paper analysis of NEET UG 2018. You can also check here the colleges accepting the NEET score in 2018.

Please visit this link as well:

Https://medicine.careers360.com/articles/neet-cut-off.

 You can also use our paid MBBS companion for expecting your right MBBS and BDS college for you on the basis of your rank and marks. Enter details here:

Https://www.careers360.com/mbbs-companion/order-summary/platinum?icn=Platinum_order_details&ici=mbbs-companion_txtad_btwcont

Good Luck!