Please help

Put some air in your tires: Let \\" represent the number of tires with low air pressure on a randomly chosen car. The probability distribution of X is as follows. X 0 1 2 3 4 P(x) 0.2 0.1 0.4 0.2 0.1 Send data to Excel Part 1 of 2 (a) Compute the mean J . Round the answer to one decimal place. He = 1.9 Part: 1 / 2 Part 2 of 2 (b) Compute the standard deviation O . Round the answer to at least three decimal places. X