SOLUTION: Gregg wants to buy 12 songs but can only afford 7. How many ways can he buy 7 songs out of 12.

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Question 1057392: Gregg wants to buy 12 songs but can only afford 7. How many ways can he buy 7 songs out of 12.
Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
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C%5B12%5D%5E7 = %2812%2A11%2A10%2A9%2A8%29%2F%281%2A2%2A3%2A4%2A5%29.

It is the number of combinations of 12 things taken 7 at a time.

If you want to learn more about combinations in combinatorics, see the lessons
    - Introduction to Combinations
    - PROOF of the formula on the number of Combinations
    - Problems on 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".