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