Where will you get your next pet? According to an Associated Press/Petside.com poll, half of all pet owners would get their next dog or cat from a shelter (USA Today, May 12, 2010). Consider a random sample of 20 pet owners and define x as the number of pet owners who would acquire their next dog or cat from a shelter. Assume that x is a binomial random variable.

a. For this binomial experiment, what is n?

b. Find P1x = 72.

c. Find P1x Ú 32.

d. Find P1x 7 52.