Chapter 6.2, Problem 6.22E

According to the National Marine Manufacturers 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 $x=$ 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. $P(x\le 8)$    c. $P(x=10)$

d. $P(x=12)$    e. $P(7\le x\le 13)$