Find the mean of first five multiples of 3.

Explanation

To find the mean of the first five multiples of 3, follow these steps:

### Step 1: Identify the first five multiples of 3.
The first five multiples of 3 can be calculated by multiplying 3 by the integers 1 through 5:
- 3 × 1 = 3
- 3 × 2 = 6
- 3 × 3 = 9
- 3 × 4 = 12
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