This is not a question but I think people commenting ''The answer to your question is in the file. Link below!'' are hackers or bots. Note: this is an assumption, and i think they are bots are hackers because they keep commenting on people's questions. So please be careful even though you don't believe me. I understand you don't believe me because I said it's an assuption.

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)