25) What is the average of the first 50 positive integers? 25 25.5 26 26.5 27

## Step 1
The problem asks for the average of the first 50 positive integers. The average of a set of numbers is calculated by adding all the numbers together and then dividing by the number of numbers.

## Step 2
The first 50 positive integers are the numbers from 1 to 50.

## Step 3
To find the sum of these numbers, we can use the formula for the sum of an arithmetic series. The formula is:
### $S = \frac{n}{2} \times (a + l)$
where $S$ is the sum of the series, $n$ is the number of terms, $a$ is the first term, and $l$ is the last term.

## Step 4
In this case, $n = 50$, $a = 1$, and $l = 50$. Substituting these values into the formula, we get:
### $S = \frac{50}{2} \times (1 + 50) = 1275$

## Step 5
Now, to find the average, we divide the sum by the number of terms:
### $\text{Average} = \frac{S}{n} = \frac{1275}{50} = 25.5$