Tree Diagrams

During the beginning of the course, we begin with Probabilities. When we were given the assignment to use a Tree Diagram, I was thrown off guard because I didn't know much about it. I found out that calculating probabilities isn't an easy task. Yet there are ways of solving a given problem, either with addition or multiplication.
After searching through a couple of sites, I found a particular site that gave me more information on what and how a Tree Diagram works. There is a Branch, Probability and an Outcome. Using these three, you calculate the probabilities by multiplying the first and second stages, and you would add all the outcomes together to reach the sum of 1