Calculate the Average: Finding Mean of 20 and 10

To calculate the average of the numbers 20 and 10, we will follow these steps:

• Step 1: Add the two numbers together. We have $20 + 10 = 30$.
• Step 2: Divide the sum by the number of values, which is 2. So, we have $\frac{30}{2} = 15$.

Therefore, the average of 20 and 10 is $15$.