More Brain Teasers/RTFQ by LuskT

Question 6

(In honor of ABC VI) A woman keeps assorted ben wa balls in a drawer. In her collection are 4 gold ones, 5 silver ones, and 3 black ones. If she reaches into the drawer in the dark, how many ben wa balls does she have to remove to be sure of having a matching pair? (Assume it's impossible to distinguish between the colors by feel).