This Challenge Problem is a little dirtier than the last one.
Let us start with a series of glass windows which are randomly splattered with mud. In fact each window has 40% of its surface covered with mud. On the average how many windows would you have to stack together to obscure at least 95% of the sunlight incident on the stack of windows? Assume that the splattering patterns are completely random and are not related to any of the patterns on the other windows.
Posted in: Challenge Problem