Symbols:X

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Roman Numeral

$\mathrm X$ or $\mathrm x$

The Roman numeral for $10$.

Its $\LaTeX$ code is \mathrm X  or \mathrm x.

Variable

$x$

Used to denote a general variable.

The $\LaTeX$ code for $x$ is x .

Random Variable

$X$

Used to denote a general random variable.

The $\LaTeX$ code for $X$ is X .

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