I think that it depends on many factors: topic and keywords chosen, quality of hubs, writing style and etc. I have 10 hubs published over 1 on Hubpages and made some $. Honestly, it is cents, but the first aim of my writing is not money. I write to improve my English. I am not able to provide such as good hub quality as people whose mother-tongue is English, so I do not expect great earnings here.
My advice would be: have fun firstly and only then think about money. If you feel that you like writing, your topics become more interesting and you will attract more visitors. More visitors will generate you more earning. Good luck.