A居民区的月底统计用电情况,其中有3户用电45度,5户用电50度,6户用电42度,则平均用电()度。A.41 B.42 C.45.5 D.46

作者: tihaiku 人气: - 评论: 0
问题 A居民区的月底统计用电情况,其中有3户用电45度,5户用电50度,6户用电42度,则平均用电()度。
选项 A.41 B.42 C.45.5 D.46
答案 C
解析 平均用电量为(45×3+50×5+42×6)/(3+5+6)=45.5(度)。

相关内容:居民区,统计,用电,情况,C.45.5

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