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题目内容双击单词支持查询和收藏哦～
Each of the 120 people in a group donated one of three different amounts to charity. Of the people in the group, $$\frac{2}{3}$$ donated $10.00 each, $$\frac{1}{4}$$ donated $15.00 each, and the rest donated $25.00 each.
Quantity A
The average (arithmetic mean) amount donated per person in the group
Quantity B
$12.50
C显示答案
以上解析由 考满分老师提供。
