Demonstrates how to construct a tree diagram to systematically find out how many combinations you can make from three types of shirts, two bottom types, and two kinds of shoes. [6:16]

Discover how to use a tree diagram to figure out how many different outfits can be created from the possible shirts, bottoms, and shoes given. [6:16]

Tree diagrams allow us to visualize these counting problems using any number of parts. [0:48]

In this video (1:152) poses the question: How can trees be combined to count robots with many parts? Now, we need three kinds of parts; heads, bodies, and arms which can't be done with the table. See if you can combine the two diagrams...

Tree diagrams allow us to visualize these counting problems using any number of parts.

Video [1:31] What happens if the director changes their mind and asks for two headed robots with different heads? How do you figure the combinations?

Now it's your turn to drive. In this video [2:12] we'll present you with a casting challenge to complete using everything we've learned so far. Challenge: Build exactly 12 different robots with a total cost below $300.