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Readings for Session 9 – (Continued)
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**Tree Diagram**

A tree diagram is another way to
illustrate multiplication to figure out how many ways something
can happen. It is useful in problems where several choices or
stages follow one after another.
Each choice or stage is represented by a branching.
The total number of end-branches of the tree diagram
shows us all the different ways the choices or stages can
happen..

*Example:* A coin
is tossed three times and H (heads) or T (tails) is recorded for
each toss. How many different outcomes are possible?

Where three coins are
tossed there are eight possible distinct outcomes.

Note that the order of the outcomes is important.

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