A random variable X is defined by the average amount spent on electricity each July by a randomly selected household in a certain state Is X a continuous or discrete random variable? (a) Discrete rv (b) Continuous rv A random variable X is defined by The number of kernels of popcorn in a 1-pound container. Is X discrete or continuous? (a) Discrete rv (b) Continuous rv What is the condition to check whether the given probability mass function is valid or not? (a) P(x) = 2 (b) P(x) = 0 (c) P(x) = -1 (d) P(x) = 1 The following table denotes the probability distribution for a discrete random variable X