Let's say there are 6 positions on a ring. First we put the male in every other positions. There are only 2 different ways of doing this. Then we put females one after another into the rest 3 positions in-between those males. For each male setup, we have 6 different ways of putting 3 different females into 3 different positions. So the total ways of doing this is 2*6 = 12.
Possible answers have to deal with the relationship of accident and speed limits. For example, higher speed limit results in less congestion on the highway and congestion on the highway is the leading cause for road accidents.
Possible answers have to deal with the relationship of accident and speed limits. For example, higher speed limit results in less congestion on the highway and congestion on the highway is the leading cause for road accidents.
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发表于 2010-12-25 03:45:12
