Question

In: Statistics and Probability

Howard is picking out some movies to rent, and he is primarily interested in documentaries and...

Howard is picking out some movies to rent, and he is primarily interested in documentaries and children's movies. He has narrowed down his selections to 8 documentaries and 9 children's movies. Step 2 of 2 : How many different combinations of 3 movies can he rent if he wants at least two children's movies?

Solutions

Expert Solution

Number of different combinations with at least 2 children's movies = number of combinations with 2 children's movies + number of combinations with 3 children's movies

                                                            = 9C2 * 8C1 + 9C3

                                                            = 36 * 8 + 84

                                                            = 372 (ans)

orchestra answered 1 year ago
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