Question

What is the probability of a positive test result from the metal detector ?

Answer 1

To get the probability of a positive test, we need to add the true positives to the false positives and divide the result by the total number of tests, as shown below

`P(positive)=(102+188)/(365)=(290)/(365)=(58)/(73)=0.79452054\ldots`

Finally, rounding the answer,

`\Rightarrow P(positive)\approx0.79`

The answer is 0.79