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OpenStudy (anonymous):
HELP!!!!! In an opaque bag, there are several discs of different colors (red, green, blue) and different textures (smooth, rough). It is known that when a disc is randomly selected: P(red)=0.5 P(smooth)=0.8 P(red and smooth)=0.1 A disc is randomly selected and found to be smooth. What is the approximate probability that it is also red?
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