Hey,
The score and percentile varies for every attempt of the exam depending upon the difficulty level of the exam. But, if we look at the trends, then with 49 percentile your score should lie between 21-30.
You can check it on the link too:
https://engineering.careers360.com/articles/jee-main-marks-vs-percentile/amp

You can use the college predictor tool to know about the colleges that you can get.
https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp
Hope that helps.

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