According to some of my friends studying at IIIT Guwahati, the chance of getting into IIIT Guwahati with a rank around 38000 is approximately 70%.
Here are some of the points you should need to know:
It is important to know that All IIITDMs (Jabalpur, Kanchipuram, and Kurnool) are fully funded by MHRD and are institutes of national importance. Thus, you can decide according to your choice and convenience.