17 Apr
2007
17 Apr
'07
9:05 p.m.
Suppose you have a box with a hole on the top and the side. When you feed 10 marbles into the top hole, a mechanism in the box shuffles the marbles and sends them out in a specific permuted order. If you have 5 identical white and 5 identical black marbles, how many tries are necessary to determine the permutation?