The capital Latin letter X is used to represent a random variable in statistics
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A random variable represents an event whose outcome is unknown.
A probability distribution is a function that describes the likeliness of a random variable to take on different values.
The Latin Alphabet is a collection of 26 symbols that form the basis of the English language. The alphabet's symbols are used throughout mathematics to represent variables, constants, and coeffecients.
The latin letter x is used to represent a variable or coefficient. In algebra, x is often used to represent an unkown value. The symbol x is also used to represent the horizontal dimension in the 2D cartesian coordinate system.