There are three red balls and six white balls in the box A. There are 4 red balls and 7 white balls in the box B. A ball was taken out from box A randomly and put into box B. What's the probability of taking out a red ball from box B?
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A$$\frac{5}{18}$$
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B$$\frac{11}{36}$$
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C$$\frac{1}{3}$$
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D$$\frac{13}{36}$$
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E$$\frac{7}{18}$$
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正确答案: D