# COUNTING AND PROBABILITY - COMBINATIONS?

How many different ways can three CDs be chosen from a case of 10 CDs?

a.) 5,040b.) 210c.) 40d.) 151,200

### 2 Answers

Relevance

- hayharbrLv 71 month agoFavorite Answer
10!

over

3! (10 - 3)!

10 9 8 7 6 5 4 3 2 1

--------------------------

3 2 1 7 6 5 4 3 2 1

all cancel except 10 9 8 over 3 2 1 = 720/6 = 120

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