ItsFree

i too need help

THank you so much Melody. 

Thanks so much!

@MaxWong and @Anthrax

The probablility that you draw $2$ Black balls from the box is just $\frac13\cdot\frac58=\frac{5}{24}$

There are $\binom{8}{4}$ ways to choose 4 different members.

Yes it should be $-1+12i$.