Seven green socks, six blue socks, and five red socks are mixed in a drawer. You pull out two socks, one at a time, without looking. (a) What is the probability of getting a pair of blue socks?

(b) What is the probability of getting a pair of matching socks?

(c) Suppose that instead of pulling out two socks, you pull out four socks. What is the probability of getting a pair of matching socks, somewhere among those four socks?

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