Three students answer a true-false question on a test randomly.A random variable x represents the number of answers of true amongthe three students, taking on the value 0, 1, 2, or 3.
(a) Find the frequency distribution for x.
(b) Find the probability distribution for x.
For the same random variable x as the previous problem, find thefollowing:
(a) The expected value (b) The variance (c) The standarddeviation
