Arithmetic mean of $1$, $4$, $5$, $3$, $2$

Find the arithmetic mean of $1$, $4$, $5$, $3$, $2$.

The arithmetic mean of data is given by the formula $\mu = \bar{x} = \frac{\sum_{i=1}^{n} x_{i}}{n}$, where $n$ is the number of values and $x_i, i=\overline{1..n}$ are the values themselves.

Since we have $5$ points, $n = 5$.

The sum of the values is $1 + 4 + 5 + 3 + 2 = 15$.

Therefore, the arithmetic mean is $\mu = \bar{x} = \frac{15}{5} = 3$.

The arithmetic mean is $\mu = 3$A.