Probability vector

In mathematics and statistics, a probability vector or stochastic vector is a vector with non-negative entries that add up to one.

Here are examples of a probability vector:

$x_{0}={\begin{bmatrix}0.5\\0.25\\0.25\end{bmatrix}},\;x_{1}={\begin{bmatrix}0\\1\\0\end{bmatrix}},\;x_{2}={\begin{bmatrix}0.65\\0.35\end{bmatrix}}.$