Pleas help me it also says to show work can you pkeas do it in note book and tell me the answer pleas?i dont get it and ty!♡ ima post more questions later if you cant answer them all be aware of my profile bye~

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)