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There are 30 cookies in a jar in William’s kitchen; 15 of them are peanut butter and 15 are chocolate chip. If William reaches into the jar without looking, what is the probability that he will select a chocolate chip cookie?
Chris has six sweaters, five pairs of jeans, and four pairs of shoes in his closet. How many different arrangements of three-piece outfits can Chris make of one sweater, one pair of jeans, and one pair of shoes?
A container has six cubes. Of these cubes, two are red, one is green, and three are black. If two cubes are drawn from the container at the same time, what is the probability that both cubes will be black?