Suppose the experiment is operate a car dealership and the random variable, x, is the number of cars sold per day. The probability distribution is given by the following table. What is the variance of the number of cars sold per day? Enter your answer as a number with four digits to the right of the decimal point in the box shown below. Number of Cars Sold per Day, x 2 3 6 8 9 Probability of x. f(x) 0.10 0.35 0.30 0.20 0.05