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Probability Basicshard
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In a town, events RRR (rainy day) and WWW (windy day) have probabilities P(R)=0.3P(R) = 0.3P(R)=0.3 and P(W)=0.25P(W) = 0.25P(W)=0.25. If it is known that P(R∪W)=0.45P(R \cup W) = 0.45P(R∪W)=0.45, what is the probability that it is neither rainy nor windy?