Answer:
9/12 (75%)
Explanation:
There's a total of 12 movies (5+4+3).
Since there are 5 action, there's a 5/12 probability that he selects action.
4 comedies, so 4/12 probability that he selects comedies.
3 dramas, so 3/12 probability that he selects drama.
4+5 = 9 so there's a 9/12 or 75% probability that he won't select drama.