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【单选题】
9-6、已知某企业生产销售甲产品,甲产品边际贡献率为30%,乙产品边际贡献率为40%,甲产品销售额为400万元,乙产品销售额为200万元。该企业加权平均边际贡献率为( )。A.
35%
B.
70%
C.
33.33%
D.
36.67%
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