Answer: 
1/4 
Step-by-step explanation:
There are two possible games to choose from ( Water Tag and Duck Duck Splash). Therefore, the probability of each 1 / 2. 
The probability that you play Water Tag on day 1 is 1/2. 
The probability that you play Water Tag on day 2 is 1/2. 
Therefore, the probability that you play Water Tag on both days is 
