The random variable X, representing the number of errors per 100 lines of software code, has the following probability distribution. X f(x) 2 0.3 3 0.25 4 0.04 5 0.4 6 0.01 Use the following theorem to determine the variance of the random variable X The variance of a random variable X is o? = E(x2) . The variance is (Round to two decimal places as needed.)