Permutations/Combinations

(Permutation) Seven friends are waiting to ride the new roller coaster. In how many ways can they board the ride, once it is their turn?

• 560

• 49

• 5040

• 56

(Permutation) In how many ways can a president, vice president, and secretary be randomly selected from a class of 25 students?

• 600

• 13,800

• 72

• 15,625

(Permutation) You have five seasons of your favorite TV show on DVD. If you randomly select two of them from a shelf, what is the probability that you will select season one first and season two second?

• 1/17,400

• 1/20

• 1/25

• 1/9

(Permutation) A password consists of four letters, of which none of them are repeated. What is the probability that a person could guess the entire password by randomly selecting the four letters?

• 1/358,800

• 1/24

• 1/4

• 1/15,600

(Combination) In how many ways can you pick 2 stickers from a package of 7?

• 49

• 21

• 56

• 120

(Combination) In how many ways can 3 out of 10 students be chosen to present their projects at a craft fair?

• 120

• 7200

• 1200

• 720

(Combination) Jade is going to painter her room two different colors from among white, gray, sage, or yellow. How many combinations of two paint colors are there?

• 4

• 6

• 8

• 12

(Combination) Jade is going to painter her room two different colors from among white, gray, sage, or yellow. Find the probability that two colors chosen randomly will be white and sage.

• 1/12

• 1/6

• 1/4

• 1/8