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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.)
Cases
Number at Risk (Millions)
Malaria
110 million per year
2,100
Schistosomiasis
200 million
600
Sleeping sickness
25,000 per year
50
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