Board Thread:General Discussion/@comment-5896727-20130110130007/@comment-165.228.162.179-20130111085518

Assuming that:

- The chance to get each rare is even.

- The current rare chance on the spreadsheet is accurate (3.46%)

This would make the chance to get an event rare about 0.14% per roll. If I'm not mistaken, you would on average get 1-2 event rares per 1000 rolls.

I scored an event rare quite early in the event from the silver space bridge, so I'm thinking the chance to get them is higher. Also due to the high amount of bumblebee alt cards I am accumulating, I'm thinking that some rares are rarer than others. It'd be really hard to get accurate numbers though, without having a lot of people contributing to the spreadsheet.