A laundry basket contains 30 socks, of which 9 are black. What is the probability that a randomly s

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A laundry basket contains 30 socks, of which 9 are black. What is the probability that a randomly selected sock will be black?

P(Black) = 9/30

Simplifying, we can divide top and bottom by 3:
3/10
3/10 as a percentage is 30%