7:42 AG 1.5 1 41 K/s Statistics- -Pr... E Q Notes to the Teacher This contains helpful tips or strategies that will help you in guiding the learners. What's New Consider the outcomes of a coin tossed as a random event. The probability of getting tail is - or 50%, and the probability of getting head is - or 50% also, but it is hard to predict the outcome that will occur. In this lesson, you will learn how to determine the likeliness of the happening of an event. Mean of a Discrete Random Variable The Mean u of a discrete random variable is the central value or average of its corresponding probability mass function. It is also called as the Expected Value. It is computed using the formula: H = EXP(x) Where x is the outcome and p(x) is the probability of the outcome. What is It Examples: 1. Determine the mean or Expected Value of random variable below. X 0 P(x) uil - - uil - Solution: H = Z (xP(x)] - E (0(=) + 1 + 2(3) + 303) =D1