posted by Fakaapo .
A factory needs two raw materials, say, A and B. The probability of having an adequate supply of material A is 0.94, whereas the probability of having an adequate supply of material B is 0.96. A study shows that the probability of a shortage of both A and B is 0.02. What is the probability that the factory has a shortage of either material A or B?
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Hint: work with the probabilities of shortage of A, B, A∩B, and from the three, calculate A∪B.