Permutations and Combinations - Period 8

Determine whether the following situation is a permutation or a combination:

Selecting a lead and an understudy for a school play.

• Combination

• Permutation

How many ways can you arrange 2 letters from the word
S Q U A R E?

• 30

• 140

• 320

• 45

Determine whether the following situation is a permutation or a combination:

Picking a team of three people out of a group of 10.

• Combination

• Permutation

Determine whether the following situation is a permutation or a combination:

Picking a President, Vice-President, and Secretary from a group of 12.

• Combination

• Permutation

Determine whether the following situation is a permutation or a combination:

Choosing 3 toppings for your sundae out of a list of 15.

• Combination

• Permutation

Calculate:

₇P₂

• 0

• 7

• 42

• 210

Calculate:

₂₀P₂

• 20

• 380

• 6840

• 116280

Calculate:

₂₅C₁

• 25

• 50

• 300

• 230

In a Permutation, Order Matters.

• True

• False

From among five photos, how many ways can four of them be arranged on a shelf?

• 120

• 5

• 110 

• 20