প্রশ্ন সংশোধন করুন
প্রশ্ন:
There are 10 books on a shelf, of which 4 are paperbacks and 6 are hardbacks, How many possible elections of 5 books from the shelf contain at least one paperback and at least one hardback?
There are 10 books on a shelf, of which 4 are paperbacks and 6 are hardbacks, How many possible elections of 5 books from the shelf contain at least one paperback and at least one hardback?