There are 9 novel books, 4 drama books, 12 poetry books and 7 grammar books in my bookshelf. The books are randomly arranged in the shelf and not at all in the order of their type. What is the least number of books that must be drawn from the shelf in order to get 6 books of a particular type?	Choose the correct answer
A) 20	B) 23	C) 25	D) 28	E) None of these
If we remove all drama books that is 4 of them are gone out of 20 left with 16.   Now suppose 5 of each novel, poetry and drama are drawn out from the shelf, that is 15 more books gone, so total 19 are taken out from the shelf and left with 1.   Now the next 1 book which is pulled can be any of the three categories but it would definitely complete a set of 6 for one of the them.   1. Take out 4 Dramas.   2. Take 5 of each of the other 3, total of 15.   3. Next book you take will complete a set of 6.   Total is 4+15+1= 
<gadget id="calculator">4+15+1</gadget>
<output>20</output>
20.   20NSWER:20
<result>A</result>
There are 9 novel books, 4 drama books, 12 poetry books and 7 grammar books in my bookshelf. The books are randomly arranged in the shelf and not at all in the order of their type. What is the least number of books that must be drawn from the shelf in order to get 6 books of a particular type?