You select one red marble from the full bag in Exercise 20. What is the probability that the next marble you select will be green without replacement of the first marble?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?