Question: Suppose that the information in Exercise 9 had been presented in the following way. Facebook reports that 70% of its users are from outside the

Suppose that the information in Exercise 9 had been presented in the following way. Facebook reports that 70% of its users are from outside the United States. Of the U.S. users, two-thirds log on every day. Of the non-U.S. users, three-sevenths log on every day. Draw a tree for this situation. Why is the tree better than the table in this case? Where are the joint probabilities found?

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