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23-10-2017
Mathematics

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Find the number of ways to listen to four CDs from a selection of eight CDs.

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coochicans coochicans

23-10-2017

Answer:

8C4=8!(8−4)!4!=70

Explanation:

This is equivalent to choosing 4 from an available 8 and is hence the combination

8C4=8!(8−4)!4!=70

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