Which of the following questions is a statistical question? a. how many professional sport leagues are there? b. where do the professional sport leagues play? c. how many hours of professional training took place over the weekend? d. how many hours do you spend each week training for a sports league?

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −