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36 pages
Permutation questions are about taking a group of
objects and totaling how many ways we can arrange them
in specific ways. Here is an example that we will explain later.
In how many ways can a pet shop line up 3 cats and 3 dogs in 6
cages if the cats must be in the second, fourth, and sixth
cages?
I. The Basics: Three Steps to
Permutation Clarity
1. Figure out how many places
there are to fill.
2. Figure out how many objects potentially can go
into each place.
3. Multiply for the answer.
Example
How many outcomes are there when two identical dice
are rolled?
Following the steps:
1. Figure out how many places there are to
fill
Because there are two dice, there are two places
to fill:
__ __
2. Figure out how many objects
potentially can go into each place
Because each die has
6 different potential outcomes, we will fill the spaces accordingly:
_6_ _6_
3. Multiply for the
answer
_6_ × _6_ = 36
This is a partial free sample of our prep guide. To view the remainder of this page, purchase the 800score.com Prep Course.
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