Given:
The incidence rate of 0.7%.
The false-negative rate is 7%.
The false-positive rate is 4%.
To find:
The probability that a person who tests positive actually has the disease.
Step-by-step explanation:
Here, we have,

Let us find the probability of no disease.

And since the false positive rate is 4%,

Using Bayes's theorem,

On substitution we get,

Final answer:
The probability that a person who tests positive actually has the disease is 0.141 or 14.1%