Hi Pradeep,
Based on previous year's cutoff, your son may be able to get admission in branches like civil engineering, manufacturing engineering in BITS Pilani. There is also a possibility of getting admission at BITS Goa or Hyderabad campuses for branches like chemical, civil etc. You can find more about previous year's cutoff in the link below:
https://engineering.careers360.com/articles/bitsat-cutoff
To find out the chances of admission accurately, use Careers360's BITS College Predictor 2020 in the link below:
BITSAT College Predictor 2020 - Know your admission chances in BITS ca ...
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile