OpenStudy (christos):

Marginal Probabilities So we have a joint probability P(A and B) Lets say I want to find P(A). Which of the following is true? 1) P(A) = P(A and B) + P(A and B') or 2) P(A) = P(A and B) + P(A' and B) Thank you

2 years ago
OpenStudy (christos):

@robtobey @e.mccormick @robtobey

2 years ago
OpenStudy (perl):

you can use a venn diagram to show this

2 years ago
OpenStudy (christos):

well the question is handwritten by me so you cant just say me the answer

2 years ago
OpenStudy (perl):

|dw:1427227175897:dw|

2 years ago
OpenStudy (christos):

hm

2 years ago
OpenStudy (perl):

int. = intersect

2 years ago
OpenStudy (christos):

so I guess its the first expression 1) P(A) = P(A and B) + P(A and B')

2 years ago
OpenStudy (perl):

|dw:1427227276105:dw|

2 years ago
OpenStudy (christos):

P(A) = P(A and B) + P(A and B') its that right ?

2 years ago
OpenStudy (perl):

yes

2 years ago
OpenStudy (christos):

Thank you

2 years ago
OpenStudy (perl):

do you see how they stand for regions

2 years ago
OpenStudy (perl):

|dw:1427227416047:dw|

2 years ago