A bakery sells 5 types of cookies: chocolate chip, oatmeal, sugar, peanut butter, and macadamia nut. If you buy 3 cookies at random, what is the probability that you get exactly two chocolate chip cookies and one oatmeal cookie?
Let's reason through the problem:

1. First, we need to calculate the total number of ways to pick 3 cookies out of 5 types. This can be done using combinations: C(5,3) = 5! / (3!(5-3)!) = 10 possible combinations.
2. Now, let's find the specific combination where we have two chocolate chip cookies and one oatmeal cookie. There are three positions for the cookies: Position 1, Position 2, and Position 3.
3. We can place the oatmeal cookie in any of the three positions, so there are 3 possibilities for this arrangement.
4. Divide the number of desired arrangements by the total number of possible combinations: 3/10

Final answer: The probability of getting exactly two chocolate chip cookies and one oatmeal cookie is 0.3, or 30%.