A certain basket contains 10 apples, 7 of which are red and 3 of which are green. If 3 different apples are to be selected at random from the basket, what is the probability that 2 of the apples selected will be red and 1 will be green?
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A $$\frac{7}{10}$$
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B $$\frac{7}{20}$$
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C $$\frac{49}{100}$$
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D $$\frac{21}{40}$$
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E $$\frac{7}{40}$$