The average of first five multiples of 3 is:

Options

A. 9
B. 27
C. 18
D. 81

Answer

To find the average of the first five multiples of 3, we can follow these steps:

### Step 1: Identify the first five multiples of 3
The first five multiples of 3 are:
1. 3 × 1 = 3
2. 3 × 2 = 6
3. 3 × 3 = 9
4. 3 × 4 = 12
5. 3 × 5 = 15

So, the first five multiples of 3 are: **3, 6, 9, 12, 15**.

### Step 2: Calculate the sum of these multiples
Now, we need to find the sum of these multiples:
\[ 3 + 6 + 9 + 12 + 15 \]
Calculating the sum:
- \(3 + 6 = 9\)
- \(9 + 9 = 18\)
- \(18 + 12 = 30\)
- \(30 + 15 = 45\)

Thus, the sum of the first five multiples of 3 is **45**.

### Step 3: Calculate the average
To find the average, we use the formula:
\[ \text{Average} = \frac{\text{Sum of the numbers}}{\text{Total number of values}} \]
Here, the sum is 45 and the total number of values is 5:
\[ \text{Average} = \frac{45}{5} = 9 \]

### Final Answer
The average of the first five multiples of 3 is **9**.

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