please tell me which one to choose at iit mechanical dual or electrical dual

Dear sanju

Dual degree in electrical is better.

check the link for cutoff for both branch

http://jee.iitm.ac.in/counseling/

Please feel free to post as many doubts on our discussion forum as you can.
we will get you the answer and detailed  solution very  quickly.

 All the best.
 
Regards,
Askiitians Experts
Badiuddin