Hello , 

As your query is, you want to know how many students qualify for JEE advance after giving JEE mains paper 1 and 2. I would like to tell you that the number of qualified students have nothing to do with the count of students. After the result is generalised the administration conducting the exam sets a cut off based on the result and thereafter those students who qualify the cut off are eligible to appear for JEE advance. There no set of specific count bit but yes somehow the count is near about 1,00,000 students. 

I hope your query is solved.

Thank you.