最新提问
我的动态
登录后查看动态
题目内容双击单词支持查询和收藏哦～
There are 32 students in Jamie's eighth-grade class. Each student took a 50-point test; the class average (arithmetic mean) was 82% correct. The teacher has assigned one 4-point, extra-credit question. How many students will need to answer the extra-credit question correctly in order to bring the class average to 86% correct?
B显示答案
以上解析由 考满分老师提供。
