There are 8 books in a shelf that consist of 1 paperback books and 7 hardback books. If 4 books are selected at random without replacement, how many different combinations are there that at least one paperback book is selected?	Choose the correct answer:  A) 35  B) 45  C) 50  D) 55  E) 60
8C4 [Select any four] - 7C4 [Select all hard backs] = 35.   35
<result>A</result>
There are 8 books in a shelf that consist of 1 paperback books and 7 hardback books. If 4 books are selected at random without replacement, how many different combinations are there that at least one paperback book is selected?