What is the mean of the first 5 prime numbers ?

Answer

To find the mean of the first five prime numbers, follow these steps:

### Step 1: Identify the first five prime numbers.
The first five prime numbers are:
- 2
- 3
- 5
- 7
- 11

### Step 2: Calculate the sum of these prime numbers.
Now, we will add these numbers together:
\[ 2 + 3 + 5 + 7 + 11 \]

Calculating the sum:
- First, add 2 and 3:
\[ 2 + 3 = 5 \]
- Next, add 5 (the result from the previous step) to 5:
\[ 5 + 5 = 10 \]
- Then, add 7 to 10:
\[ 10 + 7 = 17 \]
- Finally, add 11 to 17:
\[ 17 + 11 = 28 \]

So, the sum of the first five prime numbers is 28.

### Step 3: Divide the sum by the total number of prime numbers.
To find the mean, we divide the sum by the total number of prime numbers, which is 5:
\[ \text{Mean} = \frac{\text{Sum of prime numbers}}{\text{Total number of prime numbers}} = \frac{28}{5} \]

Calculating the division:
\[ \frac{28}{5} = 5.6 \]

### Final Answer:
The mean of the first five prime numbers is **5.6**.

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