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4 May, 00:55

Jeanine Baker makes floral arrangements. She has 13 different cut flowers and plans to use 7 of them. How many different selections of the 7 flowers are possible?

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  1. 4 May, 01:00
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    1716

    Step-by-step explanation:

    13C7 = > 13!/7!6!

    or, the seven can be selected in 13 x 12 x 11 x 10 x 9 x 8 x 7 ways = > 8648640

    But, the seven can be arranged in 7 x 6 x 5 x 4 x 3 x 2 x 1 ways = > 5040

    so, total = > 8648640/5040 = 1716
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