Hello, kingfahad!

There are 15 English books, 9 Spanish books, 17 French books on a shelf.

In how many ways can you pick two books without them being the same?

Answer: . ways to get two different languages.

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There are: . possible choices of two books.

Hence, there are: . ways to get thesamelanguage.

Therefore, there are: . ways to getdifferentlanguages.

By the way, these arenotpermuations.

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