6.22 According to the National Marine Manu fac turers Association, 50.0% of the population of Vermont were boating participants during the most recent year. For a randomly selected sample of 20 Vermont residents, with the discrete random variable x 5 the number in the sample who were boating participants that year, determine the following: Source: National Marine Manufacturers Association, NMMA Boating Industry Report, p. 3.

a. E(x)

b. P(x # 8)

c. P(x 5 10)

d. P(x 5 12)

e. P(7 # x # 13)