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. In the population of the USA, estimates suggest that 1 in every 250 people (0.4%) has been infected with HIV. Tests that are given
. In the population of the USA, estimates suggest that 1 in every 250 people (0.4%) has been infected with HIV. Tests that are given to detect HIV in people are 99.5% accurate. Chris is randomly selected from the population of the USA for an HIV test and his test is "positive". What is the chance that Chris is infected with HIV
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