Case x case y case z cash $ 2,000 $ 110 $ 1,000 short-term investments 0 0 600 current receivables 350 590 700 inventory 2,650 2,300 4,100 prepaid expenses 200 500 900 total current assets $ 5,200 $ 3,500 $ 7,300 current liabilities $ 2,200 $ 1,200 $ 3,750 compute the current ratio and acid-test ratio for each of the above separate cases

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)