To begin with, a random variable is a variable whose value occurs by chance. In other words, it doesn't have a single fixed value. When you roll a die, the number that you roll is a random variable because it occurred by chance. More specifically, a continuous random variable is a variable whose value is any number within a given range. For example, if you wanted to know how many 3's you rolled in 20 turns, the answer would be a continuous random variable. This is because the value would be somewhere within the range of 0-20. Finally, a discrete random variable is a variable whose value can only take on a specific, countable number. Unlike continuous variables, there are no in-between values. The given value of any die roll is an example of a discrete random variable. It is a specific, countable number that occurred by chance.