If I got 70% in 12th from Arts without economics so may I take addmision in university of delhi I want poltical science hons
Yes, you surely can.
There is no compulsion of economics as a subject in 12th class for doing graduation from political science. Though 70% is a little less for Delhi University. If you are from general category you might need to wait for a number of cut off lists. You may get an average college though .All the best