Calcutta university is good for any degree and you can expect a placement only if you are in Top 10 and you need to have more than 60% aggregate score . Once upon a time this university is the best university but now it is not up to the mark . If you join in that university you can only get a Bachelor Degree certificate and nothing else . If you want to earn something and get a good placement then I advise you not to join CU .
Hope this helps you !