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You have seven old books and need to choose four to give away.
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You have seven old books and need to choose four to give away.
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Apr 7, 2019
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You have seven old books and need to choose four to give away.
Mathematics
high-school
Loo
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7C4 = (7x6x5x4) / (4x3x2x1) = 35 different combinations
Charter
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Apr 14, 2019
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