Calculate Average: Finding Mean When Sum Equals 15

To solve this problem, we'll follow these steps:

• Step 1: Identify the given information
• Step 2: Apply the appropriate formula to find the average
• Step 3: Perform the calculation to find the result

Now, let's go through each step:

Step 1: The problem tells us the sum of four numbers is 15.

Step 2: We will use the formula for average: $\text{Average} = \frac{\text{Sum of numbers}}{n}$, where $n$ is the number of numbers.

Step 3: Substituting into the formula, we have:

$\text{Average} = \frac{15}{4}$

Calculating this gives:

$\frac{15}{4} = 3.75$

We can express $3.75$ as a mixed number: $3\frac{3}{4}$.

Therefore, the average of the four numbers is $3\frac{3}{4}$.