The accompanying table shows the incidence of malaria and two other similar illnesses. If a person lives in an area affected by all three diseases, what is the probability that he or she will develop at least one of the three illnesses?
(Assume that contracting one disease is an event independent from contracting any other disease.)
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Cases
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Number at Risk (Millions)
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Malaria
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110 million per year
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2,100
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Schistosomiasis
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200 million
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600
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Sleeping sickness
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25,000 per year
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50
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