Talk:Summer 2015 Event/@comment-749631-20150902083911/@comment-26460664-20150902115727

If its 19% of the entire kancolle players unlocked E-7, 69% of them managed to clear E-7. Then the chance of clearing E-7 is...

P(chance of clearing E-7)=19%X69%=13.11%

woah... <<<13.11%>>>