please explain random variable and how it is used in arithmetic mean.
Answers
Answer:
In probability and statistics, a random variable, random quantity, aleatory variable, or stochastic variable is described informally as a variable whose values depend on outcomes of a random phenomenon. The formal mathematical treatment of random variables is a topic in probability theory.
How is it used in....
A random variable is a variable that is subject to random variations so that it can take on multiple different values, each with an associated probability. A random variable could be discrete, such as in the result of rolling a six-sided die.
Step-by-step explanation:
In a discrete probability distribution of a random variable X, the mean is equal to the sum over every possible value weighted by the probability of that value; that is, it is computed by taking the product of each possible value x of X and its probability p(x), and then adding all these products together, giving. .