Imagine you had 1-20 and 1-30 spinners. Describe in as much detail as you can what the relative frequency bar charts would look like for:

The sum of two 1-30 spinners
The difference between two 1-20 spinners
The sum of a 1-20 and a 1-30 spinner
The difference between a 1-20 and a 1-30 spinner
Try to provide a good explanation to convince me that your descriptions of the bar charts are correct.