Lots of different positive whole numbers were written on a blackboard. Exactly two of these numbers are divisible by 2 and exactly 13 of these numbers are divisible by 13. The biggest number on the board is M. What is the smallest value that M can have

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)