2012-02-19, 11:33 PM
Psh.
Everyone knows Double Mastery means double the rate of passing a book. So for 20% chance you have the chance of passing both book 20 AND 30. OP.
Everyone knows Double Mastery means double the rate of passing a book. So for 20% chance you have the chance of passing both book 20 AND 30. OP.

