math probability

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A man is camping. He has packed 8 black socks, 8 blue socks, 8 white socks, and 8 gray socks. It is still dark when he gets dressed. How many socks would he have to pull out of his bag to BE SURE that he has a matching pair?

  • math probability -

    If he got a different color with each pull, the fifth sock will definitely match one of the first four.

  • math probability -

    I don't know

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