(First, we add!) 11 cups + 10 plates + 9 bowls = 30 total dishes
The ratio of cups to all dishes is:
11 cups : 30 total dishes
Which can also be written as..
11/30
the ratio of cups to all dishes is 11:30 or 11/30.
I hope that helps you out! Let me know if you have any other questions in the comments!!