有甲、乙、丙、丁4人,每3个人的平均年龄加上余下一人的年龄分别为29,23,21和17.这4人中最大年龄与最小年龄的差是:( )A.14 B.16 ...

作者: tihaiku 人气: - 评论: 0
问题 有甲、乙、丙、丁4人,每3个人的平均年龄加上余下一人的年龄分别为29,23,21和17.这4人中最大年龄与最小年龄的差是:( )
选项 A.14 B.16 C.18 D.20
答案 C
解析

相关内容:有甲,余下一,年龄,人中

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