Hey
I believe it's something very obvious to believe. If it's written in your result that you have not qualified for the exam then that means you are not qualified for NET JRF.
To qualify the exam the students of general category needs to score a minimum of 40% individually in both the papers and not all together.
I guess you got confused regarding the cut off percentage. If you still have doubt will suggest you to contact the exam conducting body for more clarification regarding this issue.
Hope that helps.
Thank you
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