The random variable X is the number of people who have a col

The random variable X is the number of people who have a college degree in a randomly selected group of four adults from a particular town. Its probability distribution is given in the table. Determine the expected number of adults in a group of four from this town that have a college degree. Round the answer to two places as needed.

x 0 1 2 3 4

P(X = x) 0.1296 0.3456 0.3456 0.1536 0.0256

Solution

Consider:

Thus,

E(x) = 1.6 [ANSWER]