某公司拟将5百万元资金投放下属A、B、C三个子公司（以百万元的倍数分配投资），各子公司获得部分投资后的收益如下表所示（以百万元为单位）。该公司投资的总收益至多为 （ ） 百万元。
- A.4.8
- B.5.3
- C.5.4
- D.5.5
正确答案及解析
正确答案
解析
方法一：穷举法3百万万投资C有3.5 1百万投资A和B有1.2和0.8 3.5+1.2+0.8=5.5方法二：单位算法投资1万单位收益：A 1.2 B 0.8 C 1投资2万单位收益：A 0.9 B 0.75 C 0.6投资3万单位收益：A 0.8333 B 1 C 1.1666投资4万单位收益：A 0.75 B 1 C 1.05投资5万单位收益：A 0.7 B 0.9 C 0.96排序前3如下：投1百万A，投300百万C，还剩一百万投B，综合为1.2+3.5+0.8=5.5
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