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Derek is picking out some movies to rent, and he has narrowed down his selections to...

Derek is picking out some movies to rent, and he has narrowed down his selections to 5 children's movies, 5 documentaries, 7 dramas, and 3 action movies. How many different combinations of 9 movies can he rent if he wants all 5 documentaries?

Math   Statistics-And-Probability   
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