Combinations

How would you solve?

From the 20 DVD's you purchased this past year, you plan to take five with you on vacation. How many different sets of five DVD's can you take?

• Permutation

• Counting Principles

• Factorial

• Combination

Which of the following is an example of combination?

• Form a passcode with 4 digits

• Students line up in a queue to assembly

• Choose 4 students in a class committee

• Choose the chairperson, secretary and treasurer in a club

How would you solve?

A book club offers a choice of 8 books from a list of 40. In how many ways can a member make a collection?

• Permutation

• Combination

• Factorial

• MPC

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

• Permutation
• Combination
• Neither

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

• Permutation
• Combination
• Neither

Permutation or Combination: A group of 14 people need to take an elevator to the top floor. They will go in groups of seven. They are deciding who will take the elevator on its second trip.

• permutation

• combination

Six friends are going to play a ball game. Each team has 3 players. How many different team combinations are possible?

• 120

• 6

• 18

• 20

Kimberly has seven colors of lanyards. She uses three different colors to make a key chain. How many different combinations can she choose?

• 210

• 5.040

• 6

• 35

In how many ways can a group of 4 boys be selected from 10 if the oldest boy is included in each group?

• 84

• 81

• 504

• 6

How many basketball games are played in a 10-team league if each team plays all other teams TWICE?

• 90

• 45

• 180

• 100