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OpenStudy (anonymous):
jennie is shopping for CDS. she decides to buy 4 movie soundtrack. the movie has 8 different sound track in stock. How many different possiblilities of sound track are possible?
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OpenStudy (watchmath):
Jennie can choose 4 out of 8. So we just need to compute 8 choose 4 which is 8C4=8!/(4!4!).
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