yes u can get admission on the basis of cbse marks whitout giving aieee,or iit
if u have more then 80% IN 12 PCM then you can take admission in AMITY UNIVERSITY, SHARDA UNIVERSITY,PETROLIUM UNIVERSITYDEHRADOON ARE THERE MANY MORE UNIVERSITY ALSO TAKE STUDENTS ON THE BASIS OF 12 PCM %
if u have pcm % is 60% then u can take admission in private colleges in uttarakhand or uttarpradesh
if your % is not good in u can take admission by managment quota.