Video lessons with examples and solutions to help High School students
learn how to calculate the expected value of a random variable; interpret it as
the mean of the probability distribution.

Expected Value: E(X)

Expected value of a random variable.

Statistics and Probability : Expected Value of a Random Variable

Computing the expected value of a random variable X.

Expected value discrete random variable

In this video you learn how to find the expected value of a discrete random variable. This one is the number of dots on a die.

Expected Value and Variance of Discrete Random Variables

An introduction to the concept of the expected value of a discrete random variable. I also look at the variance of a discrete random variable. The formulas are introduced, explained, and an example is worked through.

Mean & Expected Value - Probability

A simple explanation of the mean and expected value of a discrete random variable.

Mean and Expected Value of Discrete Random Variables.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

Expected value of a random variable.

Statistics and Probability : Expected Value of a Random Variable

Computing the expected value of a random variable X.

Expected value discrete random variable

In this video you learn how to find the expected value of a discrete random variable. This one is the number of dots on a die.

Expected Value and Variance of Discrete Random Variables

An introduction to the concept of the expected value of a discrete random variable. I also look at the variance of a discrete random variable. The formulas are introduced, explained, and an example is worked through.

Mean & Expected Value - Probability

A simple explanation of the mean and expected value of a discrete random variable.

Mean and Expected Value of Discrete Random Variables.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.