I have 3 Facebook pages having different fans. I would like to combine all pages with fans. Is it possible? If no, how can I add all fans to a single page?
There's no real way to do this. According to their Help Ceneter: http://www.facebook.com/help/?faq=13589
I believe you'll have to invite the fans into the new page you wish to establish as the master page. All fans arrive on a page through their own action and effort, and you'll have to persuade everybody to participate in joining the new desired page. One method of persuasion is to regularly re-announce the eventual and future demise of the pages you desire to extinguish in this merger process.
I just posted a video of how to merge two Facebook pages here: http://www.youtube.com/watch?v=s80swkoDpN8&list=UUCcJDbhnWxoUG8W5olPei-g&index=1&feature=plcp Hope it helps!