## Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

P(X) = 0.2+0.12+0.14 $\lt$ 1 It is not a probability distribution, although the probability of each event in the sample space is between 0 and 1, the sum of the probabilities of all the events in the sample space is smaller than 1, therefore it does not fulfill the first requirement for a probability distribution.