Find the mean and variance for each of the data : First 10 multiples of 3.

Explanation

To find the mean and variance of the first 10 multiples of 3, we will follow these steps:

### Step 1: Identify the Data
The first 10 multiples of 3 are:
\[ 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 \]

### Step 2: Calculate the Sum of the Observations
To find the mean, we first need to calculate the sum of these observations:
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