A library has two books each having three copies and three other books each having tow copies. In how many ways can all these books be arranged in a shelf so that copies of the same book are not separated.

There are three copies each of 4 different books. In how many ways can they be arranged in a shelf?

In how many ways can 20 books be arranged on a shelf so that a particular pair of books shall not come together?

A library has 5 copies of one book, 4 copies of each of 2 books, 6 copies of ech of 3 books nad single copies of 8 books. In how many ways cn all books be arranged so that copies of the same book are always together?

A library has 5 copies of one book, 4 copies of each of 2 books, 6 copies of ech of 3 books nad single copies of 8 books. In how many ways cn all books be arranged so that copies of the same book are always together?

There are three copies each of 4 different books.In how many ways can they be arranged in a shelf?

In how many ways can 12 books be arranged on a shelf if 4 particular books must always be together.

In how many ways can 7 different books be arranged on a shelf? In many ways three particular books are always together?