There are `p` copies each of `n` different books. Find the number of ways in which a nonempty selection can be made from them.

There are p copies each of n different subjects. Find the number of ways in which a nonempty selection can be made from them. Also find the number of ways in which at least one copy of each subject is selected.

There are 3 copies each of 4 different books. Find the number of ways of arranging them on a shelf.

There are 3 copies each of 4 different books. The number of ways in which they can be arranged in a shelf is

There are 5 copies each of 4 different books. Find the number of ways of arranging these books in a shelf.

There are 'n' different books and 'p' copies of each. The number of ways in which a selection can be made from them is

There are 3 copies each of 4 different books. The number of ways they can be arranged in a shelf is

There are n books having p copies of each . The number of ways in which a selection can be made from them is :

A shopkeeper has 11 copies each of nine different books, then the number of ways in which atleast one book can be selected is