If it is not a dime, then one more coin is selected at random, and its value is noted. Find the probability that at least 1 quarter is selected.
There are 4 quarters, 1 dime, and 4 nickels in a drawer. An experiment consists of selecting a coin at random, noting its value and setting it aside. If it is a dime, the experiment ends. If it is not a dime, then one more coin is selected at random, and its value is noted. Find the probability that at least 1 quarter is selected.