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math-probability

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Eleven white socks and six red socks are in a drawer. If two socks are selected at random, what is the probability that both socks are the same color?

  • math-probability - ,

    either RR or WW
    prob of RR = (6/17)(5/16) = 15/136
    prob of WW = (11/17)(10/16) = 55/136

    prob of same colour = 70/136 = 35/68

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