Let's say BK spawns at 1% in place of a normal kat.
Let's say that for (....)'s saken book of kat fetish drops at 0.5%
And I already have freaking 400 tokens, still haven't seen a single book. Is it bad luck? Or what? I've been hunting and grinding 8-1 lifelessly since the promotion was released. Some of my friends already have 4 book drops and I have freaking absolutely nothing!!! WHY? I'm sick at tired of this stupid grindfest. It's not letting me enjoy the game anymore.
/me ends grant.
Apply binomial theorem probability.
0.01*0.005=0.00005
500 tokens=167 kats, assume none were acquired from prestige missions. (Didn't count the 3* kat hat and one material in)
If it's 0.5%, theoretically I should have one book already (200>167>100), why can't I have the book already?