Permutations and Factorials Review

What is the value of 5!?

• 5

• 10

• 24

• 120

How many different ways can 3 books be arranged on a shelf?

• 3

• 6

• 9

• 27

Evaluate the permutation 4P2.

• 2

• 6

• 12

• 24

In how many ways can a president and a treasurer be chosen from a group of 6 people, assuming one person cannot hold both positions?

• 15

• 30

• 360

• 720

What is the value of 0!?

• 0

• 1

• Undefined

• Infinity

How many different permutations can be formed from the letters in the word "CAT"?

• 3

• 6

• 9

• 27

Evaluate the permutation 5P5.

• 1

• 5

• 25

• 120

In how many ways can 4 runners finish a race if there are no ties?

• 4

• 8

• 16

• 24

What is the formula for the number of permutations of n objects taken r at a time, denoted by nPr?

• n!/r!

• r!/n!

• n!/(n-r)!

• r!/(n-r)!

How many different 3-digit numbers can be formed using the digits 1, 2, and 3 without repetition?

• 3

• 6

• 9

• 27