8. In how many ways can 12 books be displayed on a shelf if 15 books are available?: *
C 2.17945728 x 1011
math-alg - PsyDAG, Wednesday, September 26, 2007 at 12:29pm
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in a another post. Thank you.
math-alg - none, Wednesday, September 26, 2007 at 6:21pm