Hello Milan, JEE mains 2018 in PDPU for BE/B.Tech offers 273 to 283 seats all over India. Among this 50% seats open for GUJCET qualified candidates (which is the state engineering entrance examination through Gujarat quota). PDPU seats for SC is 15% and scores needed for SC/ST is 40% only.

JEE Mains paper 1 is of total 360 marks and paper 2 is of 390 marks. So, just calculate and score their 40%, which is exactly required to take admission in PDPU. 

Link to further clarify your doubt - https://engineering.careers360.com/articles/pdpu-btech-admission 

Gud luck