Hi

This is a bit difficult to predict as your marks vs percentile vs rank in JEE main depends upon a number of factors like

>>>> number of students that appeared in the  jee main exam,

>>>>kind of marks obtained by them ,

>>>>toughness level of the jee main examination for different shift etc.

But yes,

As  per our predictor at

With 50 marks

--------------------) your percentile will be around 76.64 - 80.06 considering  your shift of moderate level paper

JEE mains 2021 expected qualifying  CUT OFF percentile to be eligible for jee advanced  is given below for different categories on the basis of past year trends :

Category                  jee  main 2021 expected off percentile

---) General :-                         90-95

---) GEN-EWS :-                      70 -75

---) OBC-NCL :-                        70 -75

††† So, you hold good chance to qualify JEE main to be eligible for JEE advanced

---) SC     :-                                  50 -55

---) ST :-                                       40 - 45

---) PwD :-                                       1- 2

You can check the same at our page the link is provided below

https://engineering.careers360.com/articles/jee-main-cutoff

To help you get  the complete list of colleges that you can get , we have JEE main college predictor ,the link for which is provided below::

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Thankyou