ANSWER
P(X=4 or X=1)=0.2
EXPLANATION
From the table, the probability that X=4 is P(X=4)=0.15
and the table, the probability that X=1 is P(X=1)=0.05
We want to find P(X=4 or X=1)
Recall that
P(X=4 or X=1)=P(X=4)+P(X=1)
We substitute the given probability values to obtain:
P(X=4 or X=1)=0.15+0.05
P(X=4 or X=1)=0.2
