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Ali is picking out some movies to rent, and she is primarily interested in action movies...

Ali is picking out some movies to rent, and she is primarily interested in action movies and dramas. She has narrowed down her selections to 10 action movies and 20 dramas.

Step 2 of 2 :  

How many different combinations of 4 movies can she rent if she wants at least two action movies?

Math   Statistics-And-Probability   
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