SOLUTION: In how many ways can 4 different Math books, 5 different History books, and 2 different Filipino books be arranged on a shelf, if 2 Filipino books must be at the end of the shelf?

Question 1190129: In how many ways can 4 different Math books, 5 different History books, and 2 different Filipino books be arranged on a shelf, if 2 Filipino books must be at the end of the shelf?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
2 ways to choose the first book (F)and therefore 1 way to choose the second.
Of the other 9 books, the first has 9 possibilities, the second 8, ... Since all the math books are different and all the history books are different, may treat each of the 9 as unique.
This is 2*9!
=725760 ways.
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