题目信息
Jack has 5 cats and 1 dog. If the dog's weight is 3 times the average (arithmetic mean) weight of the cats, then the dog's weight is what fraction of the total weight of all 6 animals?
A:$$\frac{1}{4}$$
B:$$\frac{1}{3}$$
C:$$\frac{3}{8}$$
D:$$\frac{3}{7}$$
E:$$\frac{3}{5}$$
参考答案及共享解析

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已选答案:
正确答案:
C:$$\frac{3}{8}$$
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题目来源
Magoosh