The stem of a plant is bent or straight. The flowers of the plant are only yellow or blue. The probability of a plant branch bending with blue flower is 3 / 32. The probability of a plant with straight branches and yellow flowers is 7 / 32. What's the probability of this kind of plant producing blue flowers?
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A0.65
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B0.7
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C0.75
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D0.8
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E0.85
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正确答案: C