Wednesday, April 29, 2009

permutations and combinations

In a Permutation the order makes all possibilities unique so that 123 is not the same 213. However in a combination only different possibilities count in your sample space so if you have 123 then you have 132 and 231 no matter the order.So if you wanted to seperate combinations then you would need a 124 or a 341.
THE HOMEWORK
lesson 29 1 to 10 new 17 to 20 review
lesson 30 1 to 9 new 13 to 17 review
Here are the slides to help drive the point.





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