Hi Jayasurya RD

It is very difficult to predict JEE advance qualifying marks. You may calculate your expected rank by this formula :

(100 - your percentile) X 869010 / 100 . If the number of candidates increase in April session then instead of 869010 it will be no. of students appearing. Your expected rank would be

For 81 - 165111

For 73 - 234632

For 35 - 564856

although its difficult to predict but it should be approx more than 85 percentile to qualify Jee so there are less chances . Refer to link below :

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

Hope it helps :)