# Positive Test ResultNegative Test ResultHepatitis C33510No Hepatitis C1153

Question
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In Exercises 17–20, refer to the accompanying table showing results from a Chembio test for hepatitis C among HIV-infected patients (based on data from a variety of sources).

Positive predictive value Find the positive predictive value for the test. That is, find the probability that a subject has hepatitis C, given that the test yields a positive result. Does the result make the test appear to be effective?

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Step 1

Event A: selecting a subject having hepatitis-c.

Event B: selecting a subject with positive result.

Then P (A/B) is the probability of selecting a having hepatitis-c given subject with positive result.

Step 2
Step 3

P (A∩B) =335/1500.

P ...

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