SOLUTION: You want to read six out of the nine books on your summer reading list . How many diffrent ways can u pick six? Permutation or combination or neither?

Algebra ->  Permutations -> SOLUTION: You want to read six out of the nine books on your summer reading list . How many diffrent ways can u pick six? Permutation or combination or neither?      Log On


   

Question 1084319: You want to read six out of the nine books on your summer reading list . How many diffrent ways can u pick six? Permutation or combination or neither?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
Combinations. Not permutations. Since the order does not matter.


C%5B9%5D%5E6 = %289%2A8%2A7%29%2F%281%2A2%2A3%29 = 3*4*7 = 84 different ways.


On Combinations and Permutations see the lessons
    - Introduction to Permutations
    - PROOF of the formula on the number of Permutations
    - Problems on Permutations
    - Introduction to Combinations
    - PROOF of the formula on the number of Combinations
    - Problems on Combinations
    - OVERVIEW of lessons on Permutations and Combinations
in this site.

Also, you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Combinatorics: Combinations and permutations".