开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)｜3.2.5(安卓)APP下载

返回

一蒙就对 · 2019年08月21日

问一道题：NO.PZ2015120604000067 [ CFA I ]

  1. CFA I
  2. Quantitative

老师，我知道P（a|b）和P（ab）都得零，但是C咱们随便假设一下，如果说P（a）=0.3 P（b）=0.2 两个数一算最后也不得零啊 为什么选C呢？问题如下图：

选项：

A.

B.

C.

解释：

添加评论
1 个答案

Olive_品职助教 · 2019年08月21日

同学你好，你这个“两个数一算最后也不得0”是怎么算的？C选项也没说等于0呀，C选项说的是P（A orB）=P（A）+P（B）。加油哦

  • 1

    回答

  • 0

    关注

  • 527

    浏览
相关问题

NO.PZ2015120604000067 问题如下 Whiof the following statements is the most correct? A.If events A anB are mutually exclusive, then P(A or B)=P(A)-P( B.If events A anB are mutually exclusive, then P(AB)=P(A)×P(B). C.If events A anB are mutually exclusive, then P(A or B)=P(A)+P( C is correct.P(AB)=P(A)×P(is only correwhen A anB are inpennt events. In this case, P(A/B)=0,P(AB)=0，because event A anB are mutually exclusive 为啥等于0 就等于PA+PB?

2022-11-30 05:54 1 · 回答

NO.PZ2015120604000067 问题如下 Whiof the following statements is the most correct? A.If events A anB are mutually exclusive, then P(A or B)=P(A)-P( B.If events A anB are mutually exclusive, then P(AB)=P(A)×P(B). C.If events A anB are mutually exclusive, then P(A or B)=P(A)+P( C is correct.P(AB)=P(A)×P(is only correwhen A anB are inpennt events. In this case, P(A/B)=0,P(AB)=0，because event A anB are mutually exclusive 老师我知道互斥的情况下ab等于0，但是c是怎么得来的呢

2022-11-29 09:04 1 · 回答

NO.PZ2015120604000067 问题如下 Whiof the following statements is the most correct? A.If events A anB are mutually exclusive, then P(A or B)=P(A)-P( B.If events A anB are mutually exclusive, then P(AB)=P(A)×P(B). C.If events A anB are mutually exclusive, then P(A or B)=P(A)+P( C is correct.P(AB)=P(A)×P(is only correwhen A anB are inpennt events. In this case, P(A/B)=0,P(AB)=0，because event A anB are mutually exclusive 如上，谢谢

2022-10-01 11:21 1 · 回答

NO.PZ2015120604000067 解析中说到In this case, P(A/B)=0, because event A anB are mutually exclusive. P(A/B)为什么不是等于P(A)+P(B)?

2021-07-20 18:30 2 · 回答