Google shares its formula for Adsense revenue share.

Google has published its revenue sharing method for google Adsense on adsense blog.
Google has mentioned about the 2 popular searches only. They are Adsense for content and Adsense for search.
     Adsense for content publishers earn a 68% revenue share from the ads that their visitors click on. It means 68% of the revenue that Google collects from advertisers is given to publishers.
  Revenue from 'Adsense for search' is shared as 51:49 between the publishers and Google.
   Google also offers adsense for mobiles,feeds and games. However Google is not ready to disclose it. Google says that they are still evolving and google is learning about the costs associated for supporting them.