In a shelf there are 12 books, 4 books are to be Selected for reading with a condition
Q two particular books should always be selected.

In a shelf there are 12 books, 4 books are to be Selected for reading with a condition Q two particular books should always be selected.

In a shelf there are 12 books, 4 books are to be Selected for reading with a condition Q two particular books should always be not selected.

In a shelf there are 12 books, 4 books are to be Selected for reading with a condition Q without any restrictions

How many different selections of 4 books can be made from 10 different books, if There is no restriction; Two particular books are always selected; Two particular books are never selected?

How many different selections of 4 books can be made from 10 different books,if There is no restriction Tow particular books are always selected; Two particular books are never selected?

How many different selection of 4 books can be made from 10 different books, if (i) Two particular books are always selected. (ii) Two particular books are never selected.

How many different selections of 6 books can be made from 11 different books, if (i) two particular books are always selected. (ii) two particular books are never selected?

How many different selections of 6 books can be made from 11 different books, if (i) two particular books are always selected. (ii) two particular books are never selected?

How many different selections of 6 books can be made from 11 different books, if (i) two particular books are always selected. (ii) two particular books are never selected?