I don't have any work exp. and my class 10and+2 perc. was below 60 and my btech perc. is 64 perc. and is it possible to get old iim's
I am assuming you are from general category. Based on your overall academic profile, you will need to score 100 percentile to get a call for the next round.
All the best!
Based on your academics you do not have a good chance to get in old IIM's.
You can get into other colleges apart from IIMs.
Also you will require above 96 percentile to get in old IIM and 99.8 to get into top IIM.
So you will have to work really hard incase you aim at decent MBA colleges.
Good Luck.