If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content
Current time:0:00Total duration:0:48

Video transcript

to see how to put the diagrams together let's go back to the example where we had just two kinds of parts heads and bodies suppose I pick this head and this body or I can pick this body or this one let's finish off all the possibilities notice that the bottom of the diagram has six combinations as before and the diagram hopefully makes it clear that we have two choices of heads and for each of those we have three choices of bodies or two times three combinations use the next interactive to figure out what the diagram would look like if there were a different number of heads and a different number of bodies