In the US there usually 20 in a pack, 200 in a carton.
There are 10 packs of cigarettes in a carton. There are 200 cigarettes in a carton and 20 in a pack making it 10 packs a carton.
Your average pack of cigarettes has twenty too many cigarettes.
Most times its 20 cigarettes in one package.
Usually 1 pack contain 12-20 cigarettes. 1 cartoon = 10 pack, so 1 cartoon usually 120-200 cigarettes.source : http://www.lexcigarettes.com