A movie theater is showing 1 musical and 7 other movies (8 movies in total). Each type of movie is equally likely to be chosen. If 1,000 people go to the movies, how many people are expected to choose a musical? (*Hint* create and solve a proportion to help you)

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)