Final answer:
The probability that the second movie is also an action movie is 4/7.
Step-by-step explanation:
To find the probability that the second movie is also an action movie, we need to consider the remaining movies after choosing the first action movie.
Since there are 9 action movies out of 15 total movies, the probability of choosing an action movie as the second movie is 8 out of the remaining 14 movies.
Therefore, the probability is written as 8/14, which can be simplified to 4/7.