what is the average of 15.5 and 11.5

The average of 15.5 and 11.5 is calculated as follows:

• Step 1: Add the two numbers together: 15.5 + 11.5 = 27
• Step 2: Divide the sum by the number of values: 27 ÷ 2 = 13.5

So, the average of 15.5 and 11.5 is 13.5.