A drawer contains 6 red socks, 4 green socks, and 2 black socks. Two socks are chosen at random. What is the probability that they match?
What will be an ideal response?
P(match)=P(RR) + P(GG) + P(BB)
=(6?12)(5?11) + (4?12)(3?11) + (2?12)(1?11)
=1?3
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