by cyapt81 Sat Mar 20, 2010 6:43 pm
Since two of the answer choices have 9! in the denominator, try to get all of the denominators to be in terms of 9!(5) by multiplying top and bottom of each fraction:
3/8! = (9)(3)(5)/(8!)(9)(5) = 135/9!(5)
6(4!)/5(9!) = (4!)(6)/(5)(9!) = 144/9!(5)
4(3!)/9! = 4(3!)(5)/(5)9! = 120/9!(5)
3/5(7!) = (3)(8)(9)/5(8)(9)(7!) = 216/9!(5)
Answer is the fourth choice 3/5(7!)