greetings,

yes, you are eligible for DTU because your board marks although are not adequate but you will get a relaxation of 10% beacuse of SC category.

the minimum requirement is 60% in pcm but sc candidates get a 10% relaxation.

pls check with your rank in the previous year cut-off list to get a clear picture.

pls refer to the previous year cut-off list:

http://dtu.ac.in/Web/notice/2018/may/file0507.pdf

hope this helps.

good luck