There are tickets numbered 1 to 20 that are mixed up and drawn at random. What is the probability that the ticket drawn is number 3 or 5? Write your answer as a fraction, decimal, or percent (NOT ALL THREE).

Elizabeth is using a sample to study american alligators. she plots the lengths of their tails against their total lengths to find the relationship between the two attributes. which point is an outlier in this data set?

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)

Twice the sum of a number and 2 is equal to three times the difference of the number and 8. find the number.