老师出了若干份试卷,以各份试卷的平均分计算考生的成绩,某考生最后一份试卷得97分,则均分为90分,若该考生试卷得73分,则平均分为87分,那么这组试卷的份...

作者: rantiku 人气: - 评论: 0
问题 老师出了若干份试卷,以各份试卷的平均分计算考生的成绩,某考生最后一份试卷得97分,则均分为90分,若该考生试卷得73分,则平均分为87分,那么这组试卷的份数是? A. 8 B. 9 C. 10 D. 11
选项
答案 A
解析 解题指导: 设这组试卷x份。 90x-97=87x-73 3x=24 x=8。故答案为A。

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