Gold and silver box probability Template

There are 3 boxes. Each box contains 2 balls. One box contains 2 gold balls, another box contains 2 silver balls, and the final box contains one gold ball and one silver ball. You pick box at random. You put your hand in and take a ball from that box at random. It's a gold ball. What is the probability that the next ball you take from the same box will be silver? Note: You can't see into any of the boxes