Which of the following statements is correct if you roll a fair 6-sided die 600 times?
oa. you are guaranteed to get exactly 100 3's
ob. you will get exactly 100 3's if the die is truly fair
oc. you will get about 300 3's
od. you expect about 100 3's

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)