Combinations
Videos, worksheets, games and activities to help Algebra II students learn about combinations.
What is a combination?
A combination is a grouping or subset of items. For a combination, the order does not matters.
C(n,r) represents the number of combinations of n items taken r at a time.
The following figure gives the formula to find the number of combinations of n items taken r at a time. Scroll down the page for more examples and solutions.
In this lesson, you will learn
How to evaluate a combination?
How to use combinations to solve problems?
This video introduces combinations and explains how to evaluate combinations as well as solve counting problems using combinations.
Probability using Combinations
Probability of getting exactly 3 heads in 8 flips of a fair coin.
Probability and Combinations (part 2)
Math Combinations
Students learn that a combination is an arrangement of objects in which the order is not important.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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