Suppose the dial on the spinner is spun 2 times in a row.

x is the number of times the dial lands on region a.

which table represents the probability distribution for the variable x?

If you spin the dial two times there three things that can happen:
1) Dial does not land in the region A
2) Dial lands once in the region A
3) Dial lands twice in the region A
The combined probability of these three events has to be 1. 
Let's calculate probabilities of each event:

If we summ all those probabilities we get 1. 
The answer would table C (lower left corner).

if this is your spinner the answer is

the answer is

X    P

0   1/9

1    4/9

2   4/9