v*e
2 楼
随口出一个吧,出错了的话大家指正哈。
Known: on a random day:
1. Probability that Index A rises is 60%
2. If Index A rises, the probability that Index B also rises is 80%
3. If Index A doesn't rise, there is STILL a 15% probability that Index B
rises.
Question: if Index B rises, what is the probability that Index A does NOT
rise?
Known: on a random day:
1. Probability that Index A rises is 60%
2. If Index A rises, the probability that Index B also rises is 80%
3. If Index A doesn't rise, there is STILL a 15% probability that Index B
rises.
Question: if Index B rises, what is the probability that Index A does NOT
rise?
t*8
4 楼
昨天就oos了
b*t
5 楼
why do you need 1?
h*b
6 楼
大不了charge back了,哈哈
s*n
7 楼
just buy index B
【在 v****e 的大作中提到】![](/moin_static193/solenoid/img/up.png)
: 随口出一个吧,出错了的话大家指正哈。
: Known: on a random day:
: 1. Probability that Index A rises is 60%
: 2. If Index A rises, the probability that Index B also rises is 80%
: 3. If Index A doesn't rise, there is STILL a 15% probability that Index B
: rises.
: Question: if Index B rises, what is the probability that Index A does NOT
: rise?
【在 v****e 的大作中提到】
![](/moin_static193/solenoid/img/up.png)
: 随口出一个吧,出错了的话大家指正哈。
: Known: on a random day:
: 1. Probability that Index A rises is 60%
: 2. If Index A rises, the probability that Index B also rises is 80%
: 3. If Index A doesn't rise, there is STILL a 15% probability that Index B
: rises.
: Question: if Index B rises, what is the probability that Index A does NOT
: rise?
g*2
8 楼
浪费时间,估计账号被盗了,才200多信用
c*e
9 楼
大学概率的基本题
1/9
1/9
Y*0
10 楼
手贱下了一个,会很麻烦吗?
w*t
13 楼
if B(up) --> buy A(up) for sure...
the chance (otherwise) is pretty low...
the chance (otherwise) is pretty low...
G*m
14 楼
AR AN
BR 48 6 54
BN 12 34 46
BR 48 6 54
BN 12 34 46
G*m
15 楼
6%
f*o
20 楼
不会呀,就记得用全概率公式好像。老了。
【在 v****e 的大作中提到】![](/moin_static193/solenoid/img/up.png)
: 随口出一个吧,出错了的话大家指正哈。
: Known: on a random day:
: 1. Probability that Index A rises is 60%
: 2. If Index A rises, the probability that Index B also rises is 80%
: 3. If Index A doesn't rise, there is STILL a 15% probability that Index B
: rises.
: Question: if Index B rises, what is the probability that Index A does NOT
: rise?
【在 v****e 的大作中提到】
![](/moin_static193/solenoid/img/up.png)
: 随口出一个吧,出错了的话大家指正哈。
: Known: on a random day:
: 1. Probability that Index A rises is 60%
: 2. If Index A rises, the probability that Index B also rises is 80%
: 3. If Index A doesn't rise, there is STILL a 15% probability that Index B
: rises.
: Question: if Index B rises, what is the probability that Index A does NOT
: rise?
G*m
21 楼
P(BR) = 0.54
P(BR/AN) = 0.06
P = P(BR/AN) / P(BR) = 0.06/0.54 = 1/9
AR AN
BR 48 6 54
BN 12 34 46
P(BR/AN) = 0.06
P = P(BR/AN) / P(BR) = 0.06/0.54 = 1/9
AR AN
BR 48 6 54
BN 12 34 46
u*d
23 楼
Bayes conditional probability using A as a partition
c*2
24 楼
Bayes probability, undergraduate 2nd grade
G*m
25 楼
这是algebra II H
G*m
26 楼
和大学math 105
G*m
27 楼
说得很具体了吧?
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