Answer:
Last option is the correct answer.
Step-by-step explanation:
Total number of movies = 9+7+4=20
The total number of combinations of choosing 3 movies from total 20 is represented by 20C3. Then there are 9 action movies and we're choosing 3, the number of combinations will be 9C3,
Now, the probability of choosing all action movies will be:
As we know that probability of something which is not happening is given as : 1 - probability of something happening, so the probability of not choosing all action movies is given by:
Hence, option D or last option is the right one.