Last Balls The answer to the last balls question is tipped by the follow up question. Because you ask a followup question that changes nothing but the number of red balls, it's easy to infer that the # of red balls is the significant thing. The structure of the problem already suggests an odd-even angle to the problem, and you completely give it away by asking a followup with only one key change: the oddness of the # of red balls.
Thanks
Fog Creek Home |