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8 April, 18:50

An oceanic island has 15 species of birds on it. Nearby, a new island is formed by volcanic activity. Since this new island is somewhat smaller than the original island, biogeography theory that it can support 8 species of birds. If the colonizing birds must migrate from the oceanic island to the newly formed island, how many different communities of 8 species could be formed on the new island

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  1. 8 April, 19:15
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    6435 different communities.

    Step-by-step explanation:

    This is a combination problem,

    We need to know how many ways 8 species out of 15 can be selected for the new small island

    15C8 = 15! / (15-8) ! (8!) = 15! / (8!) (7!) = 6435 different communities.
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