79.1k views
3 votes
How many different combinations of 4 movies can she rent if she wants at least one horror film?

How many different combinations of 4 movies can she rent if she wants at least one-example-1
User Vvahans
by
3.7k points

1 Answer

0 votes

Given,

The total number of comedian movies is 19.

The total number of horror movies is 14.

The number of movies in combination is 4.

The number of atleast horoor movies is 1.

The total number of combination are:


\begin{gathered} Total=^(19)C_0*^(14)C_4+^(19)C_1*^(14)C_3+^(19)C_2*^(14)C_2+^(19)C_3*^(14)C_1 \\ =1*1001+19*364+91*171+969*14 \\ =1001+6916+15561+13566 \\ =37044 \end{gathered}

Hence, there are total 37044 combinations.

User Broesch
by
3.3k points