Three bags, A,B,C, contain balls of the same size. There are 9 white balls and 1 green ball in A. There are 8 white balls and 2 green balls in B. There are 7 white balls and 3 green balls in C. A ball is taken randomly from each bag. What's the probability of taking at least one white ball?
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A0.94
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B0.994
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C0.9994
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D0.99994
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E0.999994
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正确答案: B