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What about this one?
You have 105
employees and you need to select a committee of
3:
a president, a secretary and a treasurer. How many ways can
you do it?
* Does order matter?
Totally!
Check it out:
Suppose that Bubba,
Spike and Zeebo are the employees that get chosen...
These are different:
So, let's do it with
slots:
Notice that the
arranging makes the number of ways a LOT higher.
YOUR TURN:
There are
15
kids and you need to pick
9
of them to help you T.P. a house. How many ways
can you do it?
There are
15
kids and you need to pick 9
to form a softball team. You'll be assigning positions too.
How many ways can you do it?
Continued on the
next
page
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