The Random Variable X Represents the Number of Computers That

Multiple Choice

The random variable x represents the number of computers that families have along with the corresponding probabilities. Find the mean and standard deviation for the random variable x.

A) mean: 1.39; standard deviation: 0.64
B) mean: 1.18; standard deviation: 1.30
C) mean: 1.39; standard deviation: 0.80
D) mean: 1.18; standard deviation: 0.64