There are 100 differents books in a self. Number of ways in which 3 books can be selected so that no two of which are neighbours is `98C_k` is

There are 100 different books in a shelf. Number of ways in which 3 books can be selected which are not neighbours is

There are 10 different books in a shelf. The number of ways in which three books can be selected so that exactly two of them are consecutive is

There are 10 different books in a shelf. The number of ways in which three books can be selected so that exactly two of them are consecutive is

There are 10 different books in a shelf. The number of ways in which three books can be selected so that exactly two of them are consecutive is

The number of ways in which n books can be arranged so that two particular books are not together is

The number of ways in which n books can be arranged so that two particular books are not together is

Find the number of ways in which 5 different books can be arranged on 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

The number of ways in which n books can be arranged on a shelf so that two particular books are not together is