*Will Medal and Fan*

Q. A new medical screening test is used to detect a rare, non-life-threatening condition. If a person has this condition, the test always detects it. Approximately 0.9% of the population has the condition. Over many trials, the test returns a positive result 5% of the time. Julio takes the test and gets a positive result. To the nearest tenth of a percent, what is the probability that Julio actually has the condition?

A. 18.0%
B. 82.0%
C. 0.9%
D. 100%

Question

*Will Medal and Fan*

Q. A new medical screening test is used to detect a rare, non-life-threatening condition. If a person has this condition, the test always detects it. Approximately 0.9% of the population has the condition. Over many trials, the test returns a positive result 5% of the time. Julio takes the test and gets a positive result. To the nearest tenth of a percent, what is the probability that Julio actually has the condition?

A. 18.0%
B. 82.0%
C. 0.9%
D. 100%

kropot72 · Answer

The probability of a randomly selected person having the condition is 0.9%. The test always detects the condition, even though the test has a significant probability of giving a false positive. 
I hope this will help you to make the correct choice.

anonymous · Answer

I did worked out some scenarios and came up with 0.9% as the answer.

anonymous · Answer

Am i correct?

kropot72 · Answer

Yes, you are correct.