Activity:
Combinations 

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Description: 
This activity introduces students to combinations. They derive the formula for the number of combinations of n objects taken r at a time by starting with a list of permutations and eliminating those that name the same group, just in a different order. From here they see how the number of combinations is related to the number of permutations. Students then solve several problems involving combinations, including problems that involve geometry. 
Technology Type: 
TINspire  
Author: 
Texas Instruments 
Language: 
English  
Cost: 
Does not require payment for use 

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Courses: 
Math 7 
Combinations 
 Geometry 
Polygons 
 Discrete Math 
Counting possibilities, Permutations, Rcombinations, Ordered and unordered, Permutations vs. combs., Combinatorial formulas 
