If we can arrange m books in a shelf in 5040 different ways in our college library, the numberof books is :

The number of ways of arranging 6 books in a shelf is

There are k different books and I copies of each in a college library. The number of ways in which a student can make a selection of one or more books is

Ten different books are arranged on a shelf . Find the number of different ways in which this can be done. If two specified book are (a) to be together, (b) not to be together.

It is required to arrange 8 books on a shelf. Find the number of ways to do this if two specified books are (i) always together (ii) never together

There are m copies each ofn different books in a university library. The number of ways in which one or more than one book can be selected is

There are m copies each ofn different books in a university library.The number of ways in which one or more than one book can be selected is