Help with how to set up this problem.
There are 13 flavors at the soda machine, and anyone can choose 6. A sign says we are only allowed to use one of each flavor. You decide to grab a cup and fill it up with your favorite flavors at random (it’s all going to the same place, right?). How many possible soda mixtures can you make? Make sure to show your work and provide a numerical answer (i. e., don’t leave it in factorial form).