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What is the mathematical notation for choosing randomly one element from a vector length $n$? For example our vector is $[3, 4, 5]$.

newzad
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1 Answers1

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Usually we just say that $X$ is a random variable taking values $3$, $4$ and $5$. Of course you also have to specify the distribution, so you could say for example that $X$ is uniformly distributed on $\{3,4,5\}$. Various distributions also have names, and then you can use the notation $X \sim N(0,1)$, to for example indicate that $X$ is distributed like a standard normal random variable.

J. J.
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