 Intro to Combinations and Permutations
 Permutations with Repetition
 Permutations without Repetition
 Permutations Formula

License Plates  Android Lock Screen
 Tigers and Bears  Oh My

Combination without Repetition  Combination Formula
 Combining Combinations

The String of Beads  Anagrams
 Combinations with Repetition I
 Combinations with Repetition II
Combination without Repetition
Collapse Content
Show Content
In the standard Combination case, no repeated elements are allowed, so you need to choose unique items from a group.
Combination Example
Due to budget cuts, there will only be 1 winner in this year's poetry contest. Luckily only 3 people (Anna, Bill and Charlie) entered the contest. How many ways can you choose 1 winner from 3 contestants?
There are 3 possible choices. (Duh.)
Real Example
The poetry club raised some more money and can now award 2 identical prizes (without differentiating between 1^{st} and 2^{nd} place). How many ways can you choose 2 winners from 3?
Click for More
Challenge
How many ways can you choose 3 winners from 10 contestants?
Please sign in or sign up to submit answers.
Alternatively, you can try out Learneroo before signing up.