Random Variable

A random variable is a variable that can take on random, rather than predictable, values. Really. That’s it. Honest. Non-random variables typically have a single value, like the solution to the equation 2x + 4 = 8. Random variables can have loads of different values. Like the random variable that represents the outcome of rolling a six-sided die. It can be any integer from 1 to 6. Or like a stock price, it take on a whole bunch of different values, randomly of course, sometimes with no apparent pattern.