A pharmaceutical firm has discovered a new diagnostic test for a certain disease that has infected 1% of the population. The firm has announced that 95% of those infected will show a positive test result, while 98% of those not infected will show a negative test result. What proportion of test results are correct? Please answer to 4 decimal places.

What we have here is:

* 1% are infected

* 99% are NOT infected

We have to find two probabilities here:

(1) an infected person test shows positive result (correct result): (Let A)

It's 95% of 1% so, P(A) = 0.95 * 0.01 = 0.0095

(2) a person who is not infected shows a negative (correct) result in the test: (Let B)

It's 98% of 99% so, P(B) = 0.98 * 0.99 = 0.9702

So success rate would be P(A) + P(B) = 0.9702 + 0.0095 = 0.9797

answer: 1,380

step-by-step explanation:

1: you turn %15 into a decimal by moving the decimal point two places to the left.

2: and then you multiply .15 by 1,200 , which will get you 180.00

3: from there you will add 180 to 1,200

4: which will get you 1,380

hope it *im kind of slow so idk if my answer is right*