Answer
In a valid probability model, all probabilities are between 0 and 1 (inclusive) and sum up to 1.
In this model, all probabilities are bewteen 0 and 1. Adding all the probabilities:
0.05 + 0.00 + 0.07 + 0.08 + 0.10 + 0.17 + 0.15 + 0.38 = 1
Hence all the probabilities sum to 1. So this is a valid probability model
Work Step by Step
As given in answer