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～
Two balls are to be randomly selected from a bag, one at a time and without replacement. The probability that the first ball selected will be red is $$\frac{5}{8}$$. If the first ball selected is not red, the probability that the second ball selected will be red is $$\frac{2}{3}$$. What is the probability that the first or the second ball selected will be red?
Give your answer as a fraction.
Give your answer as a fraction.
7 /8显示答案
· 相关考点
6.4.4 条件概率
6.4.4 条件概率
以上解析由 考满分老师提供。
