Married-women study. According to Women’s Day magazine

(Jan. 2007), 50% of married women would marry their current husbands again if given the chance. Consider the number x in a random sample of 12 married women who would marry their husbands again. Identify the discrete probability distribution that best models the distribution of x. Explain.

*4.142 Dutch elm disease. A nursery advertises that it has 12 elm trees for sale. Unknown to the nursery, 4 of the trees have already been infected with Dutch elm disease and will die within a year.

a. If a buyer purchases two trees, what is the probability that both trees will be healthy?

b. Refer to part

a. What is the probability that at least 1 of the trees is infected?