When two fair, six-sided number cubes are used, the probability of rolling doubles is one-sixth. suppose that sydney is playing a game with two six-sided number cubes in which she rolls them a total of three times per play. what will be the mean and standard deviation of the number of doubles in a randomly selected play?
a. Mean = 0.17, standard deviation = 0.50.
b. Mean = 0.50, standard deviation = 0.42.
c. Mean = 0.50, standard deviation = 0.65.
d. Mean = 3, standard deviation = 0.42.
e. Mean = 3, standard deviation = 0.65.