X 6 7 9
P(X=x) 0.14 0.34 0.52

First, decide whether the distribution is a discrete probability distribution, then select the reason for making this decision.
Decide
a. Yes
b. No
Reason

a. Since the probabilities lie inclusively between 0 and 1 and the sum of the probabilities is equal to 1 .
b. Since at least one of the probability values is greater than 1 or less than 0 .
c. Since the sum of the probabilities is not equal to 1 .
d. Since the sum of the probabilities is equal to 1 .
e. Since the probabilities lie inclusively between 0 and 1 .