For a discrete random variable X, what is the formula for the expected value E(X)?

Show Answers

The sum of the probabilities P(x)The sum of each value x multiplied by its probability P(x)The sum of each value squared times its probability P(x)Always equal to oneNone of the above

Explanation

The expected value E(X) of a discrete random variable X is calculated by summing the products of each possible value x and its corresponding probability P(x), i.e., E(X) = ∑ x·P(x).