Permutations and Combinations.notebook
November 21, 2016
Permutations and Combinations
Factorial!
! ­ the product of all whole numbers starting from the number indicated down to 1
3! = 6! = Permutations and Combinations.notebook
November 21, 2016
Permutations ­ an arrangement of objects from a group where no object can be used more than once and the order of selection matters.
There are 8 people in the competition. How many ways could we award 1st, 2nd, and 3rd place?
Permutations and Combinations.notebook
November 21, 2016
Combinations ­ an arrangement of objects from a group where no object can be used more than once and the order of selection does not matter.
"n choose r"
There are 8 people in the competition. How many different ways could we make a team of 3?
Permutations and Combinations.notebook
November 21, 2016
Does the calculator do permutations and combinations for us?