question 1

After watching a number of children playing games at a video arcade, a teacher estimated the following probability distribution of Y, the number of games played per visit. X 2 3 4 5 P(X = x) 0.00 0. 10 0.40 0.30 0.20 (1) Find the probability of a child who plays more than 2 games per visit. (2 marks) (1i ) Find the mean and standard deviation of the number of games played per visit