Probability Distributions for Discrete Random Variables
Consider the discrete random variable, X = customer satisfaction, shown:
X 1 2 3 4 5 
P(x) 0.1 0.2 ? 0.3 0.2 
a. What is P(×=3)? 
b. What is P(x < 3)? 
c. What is P(2<_ X < 5) ?
                                             
                                          
                                          
                                       