For what percent of those tested for a certain infection was the test accurate; that is, positive for those who had the

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For what percent of those tested for a certain infection was the test accurate; that is, positive for those who had the infection and negative for those who did not have the infection?

1) Of those who tested positive for the infection, 1/8 did not have the infection

2) Of those tested for the infection, 90 percent tested negative

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