Answer
Random Variable is a real valued function on the sample space, taking values on the real line (-∞,∞)
Work Step by Step
A random variable is a real number associated with the outcomes of a random experiment. eg. if a die is rolled and X denotes the number obtained on the die, then X is a random variable which can result in any of the following values 1,2,3,4,5 or 6, each with equal probability.