A box contains 4 red chips and 2 blue chips. If two chips are selected at random without replacement, what is the probability that the chips are different colors?
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A$$\frac{1}{2}$$
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B$$\frac{8}{15}$$
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C$$\frac{7}{12}$$
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D$$\frac{2}{3}$$
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E$$\frac{7}{10}$$
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正确答案: B