题目来源
题目来源1 : PPPlus
正确率：15%
难度：5
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～
The table shows the distribution of the grades on a chemistry exam taken by a class of 40 students. If one of the students is to be chosen at random, what is the probability that the student chosen will be one whose grade on the exam is greater than or equal to 90 ?
Give your answer as a fraction.
1 /5显示答案
以上解析由 考满分老师提供。
