Each week, a clothing store gives away a shirt to a lucky customer. The
shirts vary by sleeve type (Long. Short, No Sleeve) and color Gray, Blue.
Pink). Draw a tree diagram to represent the sample space. What is the
probability that the free shirt will have short sleeves and be gray or blue?

Writing the simplest form of a fraction means the numerator and the denominator have no common factors other than 1.a. trueb. false

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)

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4