MarkDunne/33-questions — pull request #36 by yazaddaruvala (2013-11-24 21:13:51+00:00)
Title: Blood Type Division Question

Used statistics from,
http://bloodcenter.stanford.edu/about_blood/blood_types.html

I know that is US only but it was the best approximation (I Googled once). Feel free to find better statistics and appropriately change the mentioned bloodtypes.