Asked by Betty

Suppose that 3% of the population ha a certain disease. We have a test for the disease. 97% of those who actually have the disease will test positive. 12% of those who do not have the disease will also test positive. What is the probability that a randomly selected person has the disease and tests positive?
Answered by PsyDAG
Probability of both/events occurring is found by multiplying the probabilities of the individual events.

.03 * .97 = ?
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