1. Evaluating a Permutation
EXAMPLE 3
Evaluating a Permutation
Poetry
Two students are chosen from a group of 6 to read the first and second poems at the school’s poetry reading. To find how many different ways the students can be chosen, find 6P2.
6P2 – = 6!
(6 2)! 4!
Use permutation formula. =
Divide out common factors.
= 30
Multiply.
ANSWER
The students can be chosen in 30 ways.

2. GUIDED PRACTICE
for Example 3
Find the number of permutations. P3
= 60 P6
= 720

3. GUIDED PRACTICE
for Example 3 P7
= 40, 320 P2
= 9, 900

4. GUIDED PRACTICE
for Example 3
10.
What If?
Suppose 3 students are chosen from a group of 8 to read in Example 3. In how many different ways can the students be chosen?
To find how many different ways can the students be chosen, find
8P3
= 336
8P3