math
posted by Mike .
A new model of car is available in 4 exterior colors and 3 interior colors. Use a tree diagram and specific colors to show how many color schemes are possible for the car. Solve the problem using an alternative method as well.Note that you are asked to solve the problem in two different ways.

This site has several examples of tree diagrams.
http://www.enchantedlearning.com/graphicorganizers/tree/ 
12