A drawer contains 6 red socks, 3 green socks, and 2 black socks. Two socks are chosen at random. What is the probability that they match? Express the answer in decimals. 0.835
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This can be calculated using combinations: $$\binom{11}{2} = \frac{11!}{2!(11-2)!} = \frac{11!}{2!9!} = \frac{11 \times 10}{2} = 55$$ Now, let's find the number of ways to choose 2 matching socks. There are 3 cases: Show more…
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