Dutch elm disease. A nursery advertises that it has 10 elm trees for sale. Unknown to the nursery,… 1 answer below »

Dutch elm disease. A nursery advertises that it has 10 elm trees for sale. Unknown to the nursery, 3 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?

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