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题目内容双击单词支持查询和收藏哦～
In a competition, a certain contestant scored either 2 points or 4 points in each round of the competition. This contestant`s average (arithmetic mean) score for the entire competition was 3.8 points per round.
Quantity A
9 times the number of rounds in which the contestant scored for 2 points
Quantity B
The number of rounds in which the contestant scored for 4 points
C显示答案
· 相关考点
3.3.2 解二元一次方程组与相关应用题
3.3.2 解二元一次方程组与相关应用题
以上解析由 考满分老师提供。
