Using it's concept, it is found that there is a 0.5 = 50% probability that the second letter is an A.
A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, we consider that:
Hence, the total number of words is:
T = 3 x 2 x 2 = 12.
With the second letter being A, the number of words is:
D = 3 x 1 x 2 = 6.
Hence, the probability is given by:
p = 6/12 = 0.5.
More can be learned about probabilities at https://brainly.com/question/14398287