Suppose you have 30 books (15 novels, 10 history books, and 5 math books). Assume that all 30 books are different:In how many ways can you put the 30 books in a row on a shelf?In how many ways can you get a bunch of four books to give to a friend?In how many ways can you get a bunch of three history books and seven novels to give to a friend?In how many ways can you put the 30 books in a row on a shelf if the novels are on the left, the math books are in the middle, and the history books are on the right?

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Answered: Suppose you have 30 books (15 novels,…

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Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

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Suppose you have 30 books (15 novels, 10 history books, and 5 math books). Assume that all 30 books are different:
1. In how many ways can you put the 30 books in a row on a shelf?
2. In how many ways can you get a bunch of four books to give to a friend?
3. In how many ways can you get a bunch of three history books and seven novels to give to a friend?
4. In how many ways can you put the 30 books in a row on a shelf if the novels are on the left, the math books are in the middle, and the history books are on the right?

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