The probability of exposure to the flu during an epidemic is 0.6. Experience has shown that a serum is 80% succesful in preventing an inoculated person from acquiring the flu, if exposed to it. A person not inoculated faces a probability of 0.90 of acquiring the flu if exposed to it. Two persons, one inoculated and one not, perform a highly specialized task in a business. Assume that they are not at the same location, are not in contact with the same people, and cannot expose each other to flu.
Question: What is the probability that at least one will get the flu?