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12 October, 18:30

A fan of country music plans to make a custom cd with 11 of her 27 favorite songs. how many different combinations of 11 songs are possible? is it practical to make a different cd for each possible combination?

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  1. 12 October, 22:25
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    This is equivalent to asking in how many ways you can choose 11 from an available 28 and is hence the combination

    28^ Cv11 = 28!

    (28-11) !11!

    = 21474180
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