qqp question1: I need to know what equations would be used for a domino falling into a ball on a rope and then that ball hitting another domino? question2: A bag contains one ball, either red or blue. We put a red ball in the bag and shake it well. Then we draw a ball out of the bag and it turns out to be red. We now draw the other ball out of the bag as well. What is the chance that it is blue?