In a section of the forest, there are 100 weasels and 50 rabbits. Three foxes invade this region and hunt the rodents. Each fox catches an average of 4 weasels and 2 rabbits per week. How many rabbits and weasels will be left after 3 weeks? Think carefully first, then make a decision:
3 foxes catch 4 weasels each every week for a total of 3 * 4 = 12 weasels. 12 weasels are caught every week for 3 weeks for a total of 12 * 3 = 36 weasels. 3 foxes catch 2 rabbits each every week for a total of 3 * 2 = 6 rabbits. 6 rabbits are caught every week for 3 weeks for a total of 6 * 3 = 18 rabbits. There were originally 100 weasels so now there are 100 - 36 = 64 weasels left. There were originally 50 rabbits so now there are 50 - 18 = 32 rabbits left. There are 64 + 32 = 96 weasels and rabbits left. So, the answer is 96.