there were 15 english books ,9 spanish books,17 french books on a shelf.How many ways can you pick two books without them being the same.
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 the same language.
Therefore, there are: . ways to get different languages.
By the way, these are not permuations.
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